32DP (0.8 die) 3.175 gear material is 775 aluminum alloy special hardening, all the positive tolerance of the inner hole is 0-positive 0.03, M3 fixing screw holeBrand new and high qualityNumber of T: 13-17TColor:SilverQuantity:2pcsSuitable for 1/10 RC model car 3.175mm shaft brushless motor Features: easy installation, long service lifeGear surface is hard anodizedAnti-rust treatment on gear surface T number parameters13T 3.175*11.907*14mm 14T 3.175*12.701*14mm 15T 3.175*13.495*14mm 16T 3.175*14.288*14mm 17T 3.175*15.082*14mm Package includes: 2*motor gear Notes.1.1cm=10mm=0.39inch2.Due to manual measurement, please allow 1-2cm error. Please make sure you don't mind before bidding.3. Due to differences between different monitors, the picture may not reflect the actual color of the item. Thank you for your support!