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Qingdao Doowin Rubber and Plastic Co., Ltd. is a leading manufacturer of underwater open bottom lifting bags, enclosed air lift bags, proof load testing water weight bags, lifeboat & davit test water bags, salvage tubes & pontoons, marker buoys & inflatable fenders, liquid storage PVC tanks, and other products made of heavy duty PVC or TPU coating fabric.

With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used for underwater salvage, and the proof load testing of cranes, davits, lifeboats, hoist, ramps & lifts, passenger gangways, platforms and bridges. With a good reputation of quality, DOOWIN is considered as the first choice of many key industry suppliers, contractors and end-users.

DOOWIN commits to high quality products with well-equipped testing equipment and strong technical force. DOOWIN's products passed rigorous ISO9001:2008 Quality Management System. All underwater air lift bags are manufactured in line with IMCA D016 Rev3 Standard. All of our products are BV, SGS, and CCS certified.

We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!