RealTruck Cap-Pack Specifications 100lb Capacity (evenly distributed weight) 40" - Fits most 5 1/2' truck beds (actual drawer size 40"L x 36"W x 5 1/2" D) 50" - Fits most 5 1/2' truck beds (actual drawer size 50"L x 36"W x 5 1/2" D) 60" - Fits most 6 1/2' truck beds (actual drawer size 60"L x 36"W x 5 1/2" D)