We produced variety of front idler strain spring which were applied to CATERPILLAR, KOMATSU, HITACHI, KOBELCO and other brand of caterpillar, bulldozer, caterpillar excavator. Meanwhile, besides the specifications above we are also able to design and produce others for users as per your special requirement. Welcome to viewed details information at my website: /view.asp?id=132 For any commercial or technical question, please feel free to contact me