1.Type :R.BX.RX 2.Shape:octagonal,oval,lens 3.Size:R11-105,RX20-215,BX150-303, ... corrosive agents are present. These gaskets are designed in oval/octagonal shapes confirming to R,Bx and Rx series of API ... std 6A.1.Type :R.BX.RX 2.Shape:octagonal,oval,lens3.Size:R11-105,RX20-215,BX150-303,Inch1 ...