Hi Felix here with Cambros Hand Sink Cart. This self contained cart is design to reduce the risk of dirty hands contaminating food. The hand sink contains a double sink, two 5 gallon fresh water tanks, and two 7 gallon tanks for dirty water. This is enough for up to 70 hot or cold hand washings. The paper towel roll holder and the soap dispenses are also included with the cart. The internal hot water heater can heat 2.5 gallons of water in as little 10 minutes. This cart sends the right message that you are serious about serving safe food. Made from polyethylene, this cart will not break, bubble, chip, crack, or dent. The water pump is NSF approved and the cart is available with a ADA faucet. You can choose from a 110 volt or a 220 volt model.