Main products include double-circular-arc cylindrical gears and open linear gear. Pumping unit reducer models include 13HB, 26HB, 37HB, 48HB, 53HB, 73HB, 89HB, 114D, 160D, 228D, 320D, 456D, 640D, 912D and API228, API320, API456, API640, API912, etc.