Reduction 1:3 HTD3M Tooth Belt Pulley Kit 3M 20T 60T 11mm Width Aluminium Pulley Wheel Set HTD3M-324 Rubber Transmission BeltProduct NameTiming Pulley Belt SetModel3M-20T- BF 3M-60T-BFHTD3M-324-108T Teeth number20T60T108TTeeth pitch3mm3mm3mm/ 324mm pitch size Belt width11mm11mm10mmInner Bore4/5/6/6.35/7/8/10mm5/6/6.35/8/10/12/14/15/16/17/19/20/25mm Reduction1:4Center distance100mmPackage3M-20T timing pulley 6mm bore 11mm belt width x 1pc3M-60T timing pulley 12mm bore 11mm belt width x 1pc For different inner bores please leave a message or remark HTD3M-324-108T timing belt 10mm belt width x 1pcM4 screws x 2pcs M5 screws x 2pcs For extra other form timing pulley belt kit, please click beneath hyperlinks. XL Timing Pulley Belt Set - 11mm belt widthTiming Pullley/BeltReductionCenter Distance15T 30T / 124X 1:2100mm12T 24T / 116XL20T 40T / 140XL25T 50T / 156XL30T 60T / 172XL10T 30T / 120XL1:320T 60T / 164XL10T 40T / 130XL1:410T 50T / 144XL1:53M BF Timing Pulley Belt Set - 11mm belt widthTiming Pullley/BeltReductionCenter Distance15T 30T / 3M-2671:2100mm20T 40T / 3M-29125T 50T / 3M-31230T 60T / 3M-33615T 45T / 3M-2911:320T 60T / 3M-32415T 60T / 3M-3181:43M AF Timing Pulley Belt Set - 16mm belt widthTiming Pullley/BeltReductionCenter Distance15T 30T / 3M-2701:2100mm20T 40T / 3M-29130T 60T / 3M-33915T 45T / 3M-2911:320T 60T / 3M-32415T 60T / 3M-3181:45M Timing Pulley Belt Set - 16mm belt widthTiming Pullley/BeltReductiionCenter Distance15T 30T / 5M-3151:2100mm20T 40T / 5M-35530T 60T / 5M-43020T 60T / 5M-4101:315T 60T / 5M-4001:412T 60T / 5M-3951:52GT Timing Pulley Belt SetTiming Pullley/BeltBelt LengthBelt Width16T 60T / 200mm / 280mm200mm / 280mm7mm / 11mm20T 60T / 200mm / 280mm30T 60T / 280mm280mm40T 60T / 280mm20T 40T / 280mm40T 40T / 280mm