Materials used:Black high density polyethelene (HDPE) plastic Hi-Lid Product Dimensions (Lid Only):400 (15.7'') L x 510mm (20.1'') W x 90mm (3.5'') H Hi-Lid Weight (Lid Only):1.1kg (2.4lbs) Wolf Pack Hi-Lid Dimensions:400mm (15.7'') L x 510mm (20.1'') W x 295mm (11.6'') H Internal Dimensions:335mm (13.2'') L x 445mm (17.5'') W x 275mm (10.8'') H Weight:3.3kg (7.3lbs)