Comparison : Item # 13500, Polyethylene, White, 2.2 lb. Density, 1/2" thick X 48" X 108"
Item # 13501, Polyethylene, White, 2.2 lb. Density, 1" thick X 48" X 108"
Item # 13502, Polyethylene, White, 2.2 lb. Density, 1-1/2" thick X 48" X 108"
Item # 13503, Polyethylene, White, 2.2 lb. Density, 2" thick X 48" X 108"
Item # 13550, Polyethylene, Black, 2.2 lb. Density, 1/2" thick X 48" X 108"