For Use With Mountain Bikes, Road Bikes, Folding Bikes, Electric Bikes, And Product Features ?Aluminium Material?The bicycle crank is made of fine aluminium material, with high strength and high hardness, not easy to deform. ?Use?For bicycle mid-drive motor mounting. Size: about 21 * 3.8cm / 6.3 * 5.9inch. ?Fine Craftsmanship?Bike crank arm has a finely crafted look with standard cutting of hole, which ensures a perfect fit with the bike. ?Easy To Install?The pedal crank arm is light in weight, small in size, easy to operate, easy to install and carry and use. ?Wide Application?It is suitable for e-bike, folding bike, hybrid, mountain bike, road bike, making your ride more comfortable! All our products have passed the inspection before shipment, so please feel free to purchase. If you find any defective products due to manufacturing reasons, please contact us. We will do our best to solve your problem. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!