... 1.shape: Octagonal, Oval 2.type: R,BX,RX 3.size: R11-105,RX20-215 BX150-303 Christmas Tree" Wellhead Sealing1.shape: ... Octagonal, Oval or lens2.type: R,BX,RX3.size: R11-105,RX20-215 BX150-303, inch1/2 ... Application: W/N flange, gate valve, oil&gas industry, oil christmas tree, wellhead...9.Hardness and temperaturematerialmax hardness(HB)max temperature(degrees ...