motorcycle shock absorber parts--piston, base valve, pistion rod guide , are ... Ningbo Kingbell Powder Metallurgy Co., Ltd., has specialized in manufacturing items of powder metallurgy structure parts for 20 years. ... Items.1.) Types of Pistons, Foot Valves, Rod Guide for Shock Absorber,2.) Types of Gears / Pinion / Sprocket / Helical Gear ... .Thank you and best regards,Mary motorcycle shock absorber parts