API well head parts: Certification:API 6A Application:oilfield equipment WP:High pressure API well head parts High-pressure union, importing international advanced technology, is forged ... Jefa Machinery Co.,Ltd specialize in API 6A products as following:1) Wellheads (casing/tubing head, crosses ,flange adapter,etc)2) ... , chock valve, etc)3) Fitting(union, manifold,elbows), bop. API well head parts