Longkou Hongyuan Industry & Trade Co., Ltd., established in 1992, is located in Nanguan new village, Huangcheng, Longkou; Our main products are rubber o-rings, special-shaped rings, framework combination washers, rubber pipes, buffer seals, pump truck concrete pistons, oil seals and various kinds of plastic products, now supporting customers have covered new energy, automotive, engineering machinery, electrical machinery, textile machinery, public environment and other industries. The company has domestic first-class vacuum plate vulcanizing equipment, rubber injection machine and plastic injection molding machine, processing accuracy can fully meet customer needs; With no-rotor vulcanizer, electronic tensile testing machine, aging box, o-ring springback instrument, Universal Tool Microscope, projector and other professional testing equipment for first-class products escort. In 2015 the company passed the BSI company's TS16949 Quality System certification, in 2007 passed the state administration of quality inspection and supervision of the o-ring"National Industrial Products production license"