Check the listing for details. 2pcs GT2 Aluminum Timing Belt Pulley 24 Teeth Bore 7mm Width 7mm for 3D Printer. Condition: New. Listed at 5.16 USD. Blueprint A=19mm C=7mm D=16mm E=7mm G=M4*2 Description Features: Please note, this is 7mm bore pulley. These pulleys can be used in Ultimaker, Ditto or other 3D Pinter designs with similar kinematics. One Aluminum GT2 Pulley and one Allen key. Please see the drawing for dimensions and calculated steps per mm, for your 3D printer firmware parameters. For 3D Printing applications, GT2 2mm belt system works better than T5, T2.5, it gives better smoothness and accuracy of positioning, resulting in better printing quality. Specification: Material: Aluminum Tooth number: 24 Tooth pitch: 2mm Hole diameter: 7mm Flange: double Tooth width: 7mm Package Include: 2* Timing Pulley 4* Setscrews 1* Allen Key Shipping We ship your orders via Post Airmail within 1-5 business days after the payment cleared. 10-25 days to most countries via post airmail. Delivery time depends on destination, weather, customs and other factors, sometimes it will require a bit longer. If you don't receive the item after 25 days, please contact us, we'll investigate and solve the delivery problem. Payment Accepted wide range of payment methods. Please click on the "Shipping and payments" tab above to view all options. Payment must be received within 7 business days of auction closing. Conact us ALL emails would be replied within one business day! We will try our best to save your problem ASAP. If there's any dissatisfaction, please contact us first so that we can help you. If there's any suggestion for our service, please contact us. We will much appreciate it and try to improve our service. Return Every item is checked carefully before shipping, buy with confidence! Refund or replacement request is available only requests within a week after parcel received & returning the item as the same condition as received. Please contact us before you return it, and pls include your eBay ID and brief description of defective problem in your return package. Who bear the return cost? This will depend on the reason you want to return. Feedback We will automatically leave positive feedback to every buyer to complete the transaction. We maintain high standards pursuit of 100% customer satisfaction! Feedback is very important to us. Good communication can solve all the problems, if you have any questions, please contact us, we will promptly solve the problems you are experiencing.