The products are mainly used to test the loads of offshore oil drilling platforms and the hoisting equipment such as all kinds of ocean vessel cranes, large-scale cranes and others. Water bag meet the demand of device safety load by loading water, variable load can be infinitely increased or decreased, so hoisting water bag is a unique product of high standard, which is designed and applied to replace existing solid standard blocks. Water bag made of high-strength fabric, simple design , triple sling special design for efficient operation, against body sag fitting and etc ,to ensure project effect and safe .