bevel gears 1.metal gears:iron stainless steel 2.Size:1-80 mm ... gears and gear box.HENGKO Powder Metallurgy gear includes: bevel gear, gear, gear box, planetary gear, gear sector, sun gear, straight ... helical gear, helical gear, multi-layer gears, miniature gears, ... items.www.hengko.com Making small ponion bevel gears