... brass 2.has angle of 0 to20,easy installation 3.reduce friction Increased using life mould parts with high quality core holder ... 1.core holder material:s45c+brass2.has angle of 0°to20°,easy installation3 ... Shouldered ejector pins,Ejectorsleeves, Leader pin/Guide pin, Guide bush, Angle pin,Shoulder guide bushing, Sprung Cores ,Air poppet valves . ...