@GB Features: 6061 aluminum alloy construction for good toughness and light weight. Four-bolt bar clamp holds bar securely in position. Easy to install on your bikes. Suitable for 31.8mm handlebars and 28.6mm front forks. Specification: Central Distance: 60 mm /70 mm / 80 mm / 90 mm / 100 mm / 110mm (optional) Angle: 25 Material: 6061 aluminum alloy Fork Clamp Diameter: 28.6 mm Handlebar Clamp Diameter: 31.8 mm Weight: Approx. 121.0 - 135.8 g / 4.3 - 4.8 oz Package List: 1* Bicycle Stem Shipping: 1.We guarantee to ship goods out within 24-72 hour after payment confirmation except holiday. 2.We ship by China post,HKpost EMS,DHL,Fedex,according to your choice when placing orders . 3.If you didn't receive the item after 45 days,please feel free to contact us.We will make all our effort to resolve the problem. 5. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. Warranty: 1.All items have 1 year guarantee.IF your purchase do not meet merchantable quality, fitness for purpose or match the description, We can make sure your issues are resolved . 2.For wrongly-shipped items, Please contact us in 48 hours after delivery.We will arrange to deliver the correct items or return all your payment. 3.For defective or faulty products,please take photos or videos,we would resend or refund after confirmation.