Gears, pinion,sprocket, helical gears,valve, pistion,rod guide,rotors,sintered parts, shock absorber parts Ningbo Kingbell Powder ... Kingbell has more than 1500 items of sintered metal parts below:1.) Pistons, Foot Valves, Rod Guide for Shock Absorbers or Dampings ... of Automobiles; 2.) Gears , Helical Gears, Bevel ...