The Shimano Altus M310 7/8 Speed RD-M310 Rear Derailleur Hangar Mount is a durable and high-quality component designed for hybrid bikes. Made from aluminium and featuring a short cage derailleur cage length, this black unit is lightweight at 310g. Compatible with Shimano brand components, this rear derailleur hanger mount is a reliable choice for cyclists looking to upgrade or repair their bike's rear derailleur system. The set includes a single unit, perfect for those in need of a durable and efficient rear derailleur solution.