Single lifting box:applied to bale cotton type,wool type,three dimensional and composite fiber with capacity 10T-25T/D Double lifting box:applied to bale three dimensionalor composite fiber with capacity 30T-60T/D Doube chamber box:applied to bale cotton type,wool type,three dimensional and medium and long fiber with capacity 30T-60T/D Each type can add a weighting device,and its error is within 1%. Application: Bale cutted staple fiber to be certain weight package, and the weight of each package is according to client's requirement.