Cambro (1520CBPF180) 15" x 20" Flat-Bottom Bus Box - Poly Cambox [Case of 12] Flat bottom bus box is made of an economical high gloss plastic for long service with normal use Use for bussing, storing or transporting It will not stick when nested Available in light gray color Measures 15-5/16-inch width by 19-15/16-inch length by 4-15/16-inch height