... .OEM as your design. 3.Various materials. 4.Good quality. quick coupling features:1.It can be used under a variety of ... hold the mating part together.4.Before delivery,all the quick couplers and plugs will be strictly tested for its working ... leakage,surface finishing and thread test.5.Common working fluids:pneumatic,hydraulic,fluids,steam,water,oil,fuel,chemical,gas,or other Applications ...