... Recoil sping track coil spring for excavator and bulldozer Specifications Recoil spring Track coil spring for Komatsu ... steel, aluminum, cold rolled steel with various plating; 3) Surface treatment: kinds of plating (Zinc, Nikel, ... PC130,PC240, PC200-1-3-5-6, PC220-1- 3-5, PC300-3-5, PC4001-3-5, D20, D30, ... EX150,EX100M,EX100,EX120,EX150, EX200-1-2-3, EX300-1-3- 5, EX400, UH08, UH07Caterpillar: E110B, ...