It minimizes the leakage of steam or gas between rotor and diaphragm, widely available depending on pressure stage, tooth shape or materials. It is a main part that further minimizes the vibration of rotor, while improving efficiency of steam production. - Type : Hi-Low, Straight, Slant, etc. - Material : HIP-B7B18, B50A265(A387), B50A908, LP-B11G21B,...