... of operation. We have dealt in sprocket for many years and export to Singapore, Malaysia, ... -excavator: PC60-5, PC60-6, PC100-3, PC100-5, PC200-3, PC200-1, PC200-3, PC200-5, PC300-5, PC200-6, PC400-5, HD400, ... HD450, HD550, HD700-2, HD770, HD820, HD1250, UH0083, UH07-7,EX30, ... R210-2, R320, MS110-8, MS180. Track Rollers for Komatsu Construction Machineries