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XH-22 Manual Lowering Device Detailed Product Description:· Manual Lowering Device has a unique braking system provides a constant,Website:http://www.xieheemss.com, steady lowering speed.· Gears are large and tested to bear loads in excess of demand.· Castings are of non-corrosive aluminum and easy access to all internal working parts. · Ball bearings throughout for noiseless, smooth, and fully automatic operation.Technical Features:1.Packing Size: Main top:96*21*21cm, 96*21*21cm; 152*18*10cm