... : R11-105 4.certificate:API 6A valve parts---ring joint gasketsAPI 6A ASME B16.20standardised productionSwift deliverySpecialized gasket supplierAPI 6A ... HG20633 Material: carbon steel, soft iron, inconel600, M-400, C-276, Incoly825, 321, 347,316,304,Gr.630(A264-17 ... customer's requirements and specific drawings. Besides, our ring joint gasket could seal your products perfectly. our production is always ...