Brass worm and worm gear set Specifications: Material:Brass Color:As Shown Modulus:0., 4 Number Of Teeth:120 Hole Diameter:12MM(0., 47) Speed Ratio:1:120 Package Include: 1PCS X Turbine 1PCS X Worm Rod Note: 1., Please Allow 1-3 CM Error Due To Manual Measurement., 2., As Different Computers Display Colors Differently,The Color Of The Actual Item May Vary Slightly From The Above Images,Thanks For Your Understanding. Made Of High Quality Brass,Durable The Diameter Of Both Ends Of The Worm Is 5MM (Convenient For Loose Fitting Bearings Or 5MM Gears),And The Total Length Is 75MM. 1:120 Reduction Gear Set 059 0.4 Modulus Worm Gear 120 Teeth 0.4M 120T 12MM Hole Diameter Gear 1 Decelerating Turbine Gear For DIY Projects The Turbine Has An Outer Diameter Of 49.3MM,Thickness Of 6MM,And An Aperture Of 12MM Center Distance 29.5MM (Including Lateral Clearance) Best Brass Worm Gear Shaft China Manufacturers, suppliers, factory Description: Brand New And High Quality The Turbine Has An Outer Diameter Of 49., 3MM,Thickness Of 6MM,And An Aperture Of 12MM , Center Distance 29., 5MM (Including Lateral Clearance) Description: Brand New And High Quality. Uxcell Bevel Gears 2M 20 Teeth 12mm Hole Tapered Bevel Pinion Gear, 4mm The Diameter Of Both Ends Of The Worm Is 5MM (Convenient For Loose Fitting Bearings Or 5MM Gears),And The Total Length Is 75MM