Material: Phenolic resin Color: Black Special requirements: The diameter of internal control can be numbered and requirements of the custom.Type D D1 H d h I s L W0012100 100 34 27 12 18 13.8 4 50 W0012125 125 34 29 12 18 13.8 4 63 W0012160 160 44 38 16 20 18.3 5 80 W0012200 200 50 46 18 25 20.8 6 80 W0012250 250 56 51 25 28 28.3 8 100 W0012300 300 69 58 25 28 28.3 8 100