... , lens 3.size: R11-105 4.certificate:API 6A valve parts---ring joint gasketsAPI 6A ASME B16.20standardised productionSwift deliverySpecialized gasket supplierAPI ... 6A ring Joint Gasket (RTJ) 1.type: R,BX,RX,IX ... ,RX20-215 BX150-303, inch 1/2-inch244.certificate:API 6A, ISO9001:2000 5. pressure: PN2.0(CLASS150)-PN42.0(CLASS2500 ...