1This freewheel is made of high quality steel, high strength, anti-rust, non-deformation, wear-resistant and durable 2Hollow out design reduces much weight to lessen the burden of long time cycling 3It can promise smooth rotation of chain, suitable for chain ring between 11-32T 4Designed for 8 speed bike, suitable for Shimano 5Easy to install and useFeatures:This freewheel is made of high quality steel, high strength, anti-rust, non-deformation, wear-resistant and durable. Hollow out design reduces much weight to lessen the burden of long time cycling. It can promise smooth rotation of chain, suitable for chain ring between 11-32T. Designed for 8 speed bike, suitable for Shimano. Easy to install and use. Specification:Material: SteelColor: Shown as pictureApplicable for Bike Chain Ring Range: 11-32TSuitable for Shimano Size: Approx. 13 x 2.6cm / 5.12 x 1.02inWeight: Approx. 305gPackage List:1 x Bike Freewheel Set Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.