... ~4000diameter 3.Standard:ISO,ASTM,JIS,DIN,BS Stainless Worm Gear ISO9001:2000 system certifiedStandard: ISO, ASTM JIS, DIN ... machiningHigh quality,reasonable price,considerate service.... Production way: Brass by Sand Casting, Centrifugal casting and Metal mould CastingDimensions ... metal part, Copper fitting, Copper nut, Bushing, Gear, Worm and Worm Wheel,Copper bushing and all non-ferrous metal alloy ...