Chian grease nipple for excavator various types for all kinds excavator no leakage,no stain,good quality Chain Grease Nipple/Nozzle/Zerk for Lubrication Application on ExcavatorModel:RT-CGNMaterial:carbon steel, brass,stainless steelSurface treatment: zinc plating, nickel plating, copper plating, chrome platingType: Komatsu, Hitachi, Kato, Kobelco, Daewoo,Sumitomo etc.Inch of size: NPT,SAE, BSP , ...