... . Bore size: 7-1/16", 9", 11", 13-5/8", * Cameron BOP, Shaffer type annualar BOP and ram BOP. * Bore size ... 16A / ISO4~8weeksBy wooden caseT/T, L/CJefa Machinery Co,.Ltd,which engaged in API 6A&16A products : 1) Wellhead and ... reduce costs so that we can better serve our customers Cameron BOP ( oil field)