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 assorted types, teeth, apertures, and widths. All products endure quality testing before sale, so that you should buy with confidence.You can straight seek for merchandise of alternative specifications in the store. If you can't discover what you need, or if you wish to customize a non-standard pulley, please touch us, and we will job the non-standard timing wheel in keeping with your requirements.If you've got any questions, please be at liberty to inquire. Thank you!ShippingWe do our best to supply you with the most reliable and inexpensive method of shipping. Butsometimes overseas delivery depends heavily on the courier corporation and local customs/duties. If you don't receive your item on time, please touch us straight for extra assistance. Thanks in your understanding.After-sales feedbackYour pleasure and fine feedback is very important to us. when you are satisfied with our goods and services. Please go away positive suggestions and five starsYour satisfaction is our best goal,Try your splendid to solve the problems for you.If you have any issues of our goods or services, please be happy to contact us first earlier than you leave adverse feedback.