These lava rocks are gas
grill replacements, and should only be
used on gas grills and charbroilers that
are
designed to use lava rocks. Clean the rock
grate
and firebox after removing
old lava rocks. Place the new
lava rocks on in one layer,
close the grill and burn
grill on "High" for fifteen
minutes, to allow the rocks
to season. One bag covers
approximately 300 square
inches. Sold in 7lb. bag.