Product Information【Product Name】:HTD-3M Pulley Belt Kit【Product Material】:Aluminum alloy【Tooth Pitch】:3mm【Transmission Ratio】:4: 1【Number of Teeth】:72Teeth and 18Teeth【AF-72T Bore】:8/10/12/14/15/17/19/20/25mm【AF-18T Bore】:4/5/6/6.35/8mm【Belt Width】:15mmOur Customization and ServiceWe sell synchronous pulleys of varied types, teeth, apertures, and widths. All merchandise endure quality checking out before sale, so that you can buy with confidence.You can directly seek for products of other specs in the store. If you can not discover what you need, or if you wish to customize a non-standard pulley, please contact us, and we will activity the non-standard timing wheel in keeping with your requirements.If you've got any questions, please be happy to inquire. Thank you!ShippingWe do our greatest to produce you with essentially the most reliable and reasonably priced approach of shipping. Butsometimes international shipping depends closely on the courier company and native customs/duties. If you don't obtain your item on time, please touch us straight for further assistance. Thanks for your understanding.After-sales feedbackYour satisfaction and high quality suggestions is very important to us. while you're convinced with our goods and services. Please leave fine suggestions and five starsYour delight is our greatest goal,Try your ultimate to solve the issues for you.If you've got any problems with our items or services, please feel free to touch us first before you permit unfavorable feedback.