For A Mountain Bike, The Vbestlife Single Speed Freewheel And, Tooth Sprocket. Product Details Specification: Item Type: Bike Freewheel Kit Material: Steel 16 Tooth Flywheel Size: Inside Diameter: Approx. 35mm/1.4in Outer Diameter: Approx. 70mm/2.8in Flywheel Tooth Number: 16 Package List: 1 x Flywheel 1 x Sprocket 1 x Chain Note: Manual measurement please allow some errors. The bicycle freewheel chain kit is made of high quality steel, corrosion resistant and has a long service life. The bike freewheel kit is made of high quality forging process for hardness and no deformation. Inside Diameter: Approx. 35mm/1.4in. Outer Diameter: Approx. 70mm/2.8in. Flywheel Tooth Number: 16 The bike freewheel kit is suitable for converting bikes, go karts, beach bikes, mini scooters etc. Simple to be removed or installed by freewheel tools.

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If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.