This is the Carlisle 1074289 polyethylene square food storage lid. The purple lid has non-slip texturing that provides secure stacking and scratch resistance. Pair the lid with a StorPlus Square Container (sold separately). The Snap-On lid fits 12, 18 or 22 quart containers made of both polycarbonate and polyethylene materials. The lid is dishwasher safe and NSF Listed. It is temperature safe from -40°F to 180°F. It has overall measurements of 11.38 x 11.38 x 0.63 inches (L x W x D).