China ZHC Series Double Sheave Wire Rope Block for Ship-twin Hook: ZHC Series Double Sheave Wire Rope Block for Ship-twin Hook SWL: 20-40Ton For Wire Rope: 26-30mm Shipping & Packing 1.Shipping by sea or air,or as your request. 2.Standard Export Packing. The description/sizes may be different with goods, please check with us when order.