Metal Cutting Machine Gears Synchronous Pulley Gear Motor Belt Gear Mini Lathe Product name: Metal synchronous gear (aluminum alloy material) Part No: S / N: CJ0618-148 S / N: CJ0618-027 Specifications: internal diameter of the synchronous motor gear8mmWidth of groove3mm Diameter of the drill of two synchronous rear axles10mmWidth of the slot4mm colour: silver Material: metal Package Contents: 1 set x Metal Cutting Machine gears Only the above package content, other products are not included. Shipping 1.If you need to buy in bulk, please contact, we will reply in 24 hours. 2.We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. 3.Usually product Reaches after about 12-45 business days depending on destination. If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Refund or resend product will be offered if item still not received. 4.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We ask you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them!