API 6A Valves Parts Ring Joint Gasket 1.type: R,BX,RX, ... 3.size: R11-105 4.certificate:API 6A valve parts---ring joint gasketsAPI 6A ASME B16.20standardised productionSwift deliverySpecialized gasket ... 450 9. APPLIANCE: W/N flange, gate valve, oil&gas industry, oil christmas tree, wellhead assembly, petrochemical industry, oil ... and serve for them anytime anywhere. API 6A Valves Parts Ring Joint Gasket