Funn Zippa DH Chain Guide, ISCG05 Interface, BSA Adapter Included, 32T-38T, Mountain Bike Chain ProtectorSOLID & DURABLE: The Zippa DH features a fully CNCd AL6061 back plate, fully CNCd AL7075 pulley and the tough and light bash plate, fending off damage from rocks and roots. Ideal Chain Retention: The Zippa DH keeps your chain held firmly in place and the bash plate protects you and your bike against damage Tooth Capacity: Compatible with 32T to 38T single (1X) chainring Mounting Standard: Fits with ISCG05 or BB via external BB adapter EASY TO USE: Its