(1)40CR modulation worms (2)module:1 (3)pressure angle:30 4)length:118mm dia:10mm 5)low price with high quality What we can do: standard: DIN, BSW,ANSI/ASME,GB, etc. diameter: 3mm--80mm length: less than 5000mm screw pitch(lead): 0.5-24mm tolerance: +-0.01 material: carbon steel ,stainless steel and other available materials surface finish: zinc plated, nickel plated, black oxide, burger plated, ...