Established in 1996, Ningbo Qianyi Pneumatic & Hydraulic Co.,ltd(QPE) is China coupling sleeve manufacturer of metal push in fittings and other brass pneumatic fittings, pneumatic and hydraulic couplings. We are manufacturing fittings with both lnch and metric measurement system. We have a technical team with skilled workers who are able to the whole course of R&D, Quality Controls, Production, Designing. And we can manufacturing any special pneumatic & hydraulic fittings upon customers, request. We also can supply OEM coupling sleeves, and have passed ISO9001 standard.