Small Worm Gear 1.Standard: ISO,ASTM ,JIS ,DIN,BS 2.OEM service offered and various CNC machining 3.Good abrasion Small ... Worm Gear SpecificationsISO9001:2000 system certifiedStandard: ISO, ASTM ... Aluminum casting, Cast metal part, Copper fitting, Copper nut, Bushing, Gear, Worm and Worm Wheel,Copper bushing and all non-ferrous ...