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Ships free with Plus
Regularly: $0.29/Each

Other Available Sizes:

  • Eliminates the need to empty your decorating bag before changing tips
  • Made of durable, white plastic
  • Securely fastens pastry tip (sold separately) in place
  • Ideal for bakeries and cafes
  • Ridged sides along ring for easy assembly
  • Perfect for commonly sized pastry tubes

UPC Code:




Usually Ships in 1 Business Day
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You May Also Need

"You May Also Need" items are guaranteed to work with the item you are viewing, such as lids that will fit a cup or casters that will fit a piece of equipment. If an item is not listed in this section, we do not guarantee that it will work with the product you are viewing and do not recommend that you purchase them for use together.

How to Pipe a Rose with Buttercream Frosting

How to Pipe a Rose with Buttercream Frosting

Use these simple steps to professionally add a buttercream rose. You'll need a spatula, rose tips, a leaf tip, couplers, a flower nail, a rubber spatula, and piping bags. Begin by squeezing cream onto the flower nail in a circular motion, creating a lump with a tip on it. To create the layers of a rose, squeeze cream in an short arch motion and continue rotating the rose until you have the desired amount of layers, or petals.

Copy and paste the embed code above.

Ever wonder how to professionally decorate your cake? Watch this short video and learn how to style up your next cake with a classic buttercream rose.

Ateco 400 Specs
Color White
Material Plastic
Shape Round
Tip Size Standard
Type Couplers

Ateco 400 Details

This Ateco 400 white, standard coupler allows you to interchange standard sized tubes and small tubes without emptying the contents of your decorating bag to save time and labor. In addition, ridged edges on the ring allow you to easily assemble the coupler to the base with minimal effort. Ideal for bakeries, cake decorators, coffee shops, and anywhere else you need to decorate baked goods, this plastic coupler will get the job done!

Bringing you innovation and quality for over 100 years, Ateco, an August Thomsen brand, has been internationally known in the industry for creating baking tools of superior craftsmanship and design. By continually improving on tools, materials, and packaging, Ateco is dedicated to providing professional bakers with the kitchen essentials they need to succeed in an ever-evolving industry!

Overall Dimensions:
Top Diameter: 1/2"
Bottom Diameter: 1''
Height: 1 3/16''

Resources and Downloads for
Ateco 400

Pastry Tube Chart Pastry Tube Chart

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Compatible Models

This item is compatible with the listed models, according to the manufacturer. We do our best to keep this listing as accurate and up-to-date as possible. If you have any questions or concerns, feel free to contact a Customer Solutions Specialist before placing your order.

Customer Reviews

  • Overall User Rating: Ateco 400 2-Piece Standard Plastic Coupler (August Thomsen)

    4.9 stars from 227 reviews


    People Talk About:

    couplers tips great coupler easy Ateco standard pastry price bags

    This coupler fits snugly without being overly tight. It’s easy to quickly exchange tips without making a mess. The entire Ateco brand of decorating pieces is a great value.

    Posted on

    This coupler fits well on the canvas coated bags sold here. A snug fit with no loss between the bag and seal.

    You can never have too many couplers. For the quality and the price of this product, it can not be beat. I will always purchase this product.

    Posted on

    This is your standard trusty coupler at a great price since you can never have enough of these guys. Easy to clean and will last forever.

    Posted on

    This is a good quality coupler. It is heavy plastic and screws on tight. Easily washable in the sink or the sanitizer. We would purchase more if needed.

    from Steele Mansion Posted on

    Like that Webstaurant sells these individually--I'm used to purchasing these in sets of 4, which means I leave one or two unused. Does what it's supposed to. Works well. Quite durable

    Posted on

    I Love these Ateco standard couplers! The quality is much better than the other brands I have used, They are more heavy duty. These screw on good around the icing tip and I have never had any issue with leaks, etc...If you do any cookie decorating with tips you need to buy a lot of these, that way you can have one in each pastry bag when working with a lot of colors, and can switch tips easily! These are a necessity!!

    Posted on

    This is a must-have when you are decorating cakes and cupcakes. This is perfect for the smaller decorating tips and makes changing them out so easy!

    Posted on

    This is a product that makes a decorators job so much easier and quicker. It makes switching frosting tips a less daunting task than it would be.

    from Fast Casual Cafe Posted on

    Makes decorating a lot easier

    I love these couplers!! They are so easy to use and have not had it fail on me once even when I am putting a lot of pressure on it.

    from RoeMarie Cakes Posted on

    Coupler secures the tips

    This coupler is perfect for small piping tips, making it easy to change out tips with the same frosting without having to use a whole new bag.

    from Fika, LLC Posted on

    Bought 2 to try out but will buy more since they’re very inexpensive and also it’s quite easy to lose the top part. They are bigger than Wilton’s couplers so they are easier to use when cutting the disposable pastry bag.

    from San Jose Macarons Posted on

    The couplers fit with regular Wilton tips

    The two piece plastic coupler is a great thing to have, especially if you like to bake. The coupler is a standard size so it fits normal sized tips. Makes icing things easier.

    Posted on

    2 piece coupler by Ateco.

    The Coupler is very useful for making pastry, especially cream for the cup cake. It can be compatible with pastry tube, so it can give you different shapes for you cream

    Posted on

    Great standard-size cake decorating coupler! We use these with Ateco disposable decorating bags and tips. Makes changing tips a breeze. Made of good quality plastic, and the threads are clean and tight-fitting.

    from Abstruse Pastry Company LLC Posted on

    These plastic couplers will fit many sizes of Ateco pastry bags. The coupler allows for easy connection of different attachments and tube covers. If you have a pastry department it is important to have couplers on hand for your pastry bags.

    from Dig & Serve Posted on

    Inexpensive coupler.

    Great standard couplings, durable and dishwasher safe and made of thicker plastic than the other brands. I would highly recommend these to anyone looking for more standard sized couplings.

    Posted on

    The price of these couplers are unbeatable!! For a while I only had one so it was hectic trying to switch them out to use a different color frosting ??. Webstaurant has unbeatable prices..that's for sure!!

    Posted on

    I love these couplers. They work perfectly and fit all standard tips. They are priced well and ships quickly. Will order this product again! Thanks

    Posted on

    These couplers work great, and allow you to change out small tips easily at will. Even if not changing tips I do use these couplers sometimes because it does help secure in the tip.

    Posted on

    I used these with the ateco 12" pastry bags and the ateco decorating set. These worked great and as expected. And were easy to clean.

    Posted on

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