Aluminum alloy rear derailleur pulley, anti rust and anti corrosion, is compatible with most rear derailleur of 18 teeth in the market. It can reduce resistance and improve riding efficiency, so that make riding easier.<br/>Features:<br />Made of high quality aluminum alloy, anti rust and anti corrosion, can be used for a long time.<br />Ceramic bearing reduces resistance, improves riding efficiency, making riding easier.<br />Compatible with most rear derailleur of 18 teeth in the market and use 4/5/6mm guide wheel screws.<br />A good replacement accessory for road bike, mountain bike, BMX, etc.<br/>Specifications:<br />Color: Multicolor<br />Material: Aluminum Alloy<br />Diameter: 72mm<br />Size: 18T<br />Fit for: 4/5/6mm Guide Wheel Screw<br />Item Weight: 21g/ 0.7oz<br/>Packing List:<br />1 * Rear Derailleur Pulley