Main Features:<br />Functions: transmit chain and shift gears<br />CNC machined， durable and anticaustic<br />High rigidity， low heat dilating rate， non-magnetic， longer life<br />Inner diameter: 5mm <br />Best use: cycling， mountain biking， road cycling<br />Necessity for cyclist to DIY their bicycles<br /><br /><br />    Specifications<br />General<br />  For: Unisex                                                  <br />                        Type: Other Accessories                                                  <br />                        Material: Aluminum alloy                                                  <br />                        Suitable for : Mountain Bicycle， Road Bike， Bike                                                 <br />Specifications<br />  Color: Green， Gold， Silver， Black， Red， Blue                                                 <br />Dimension and Weight<br />   Product weight : 0.010 kg                                                  <br />                        Package weight : 0.043 kg                                                  <br />                        Product size (L x W x H)   : 4.2 x 4.2 x 0.8 cm / 1.65 x 1.65 x 0.31 inches                                                  <br />                        Package size (L x W x H)  : 7.0 x 9.0 x 2.0 cm / 2.75 x 3.54 x 0.79 inches                                                 <br />Package Contents<br />  Package Contents: 1 x AEST Bicycle 11T Rear Derailleur Pulley， 1 x Small Metal Tube                                                 <br /><br /><br /><br />                                                <br />