Specification：High quality 9-speed cassette, 11x32 Cogs: 11-13-15-17-19-21-24-28-32T ,Compatible with Shimano (but SLX,Micro Splin Incompatible ), Compatible with SRAM (but Sram XD,XDR, GX,X01,X11 Incompatible) Material：High strength steel ,Nickel-plated finish offers hard wearing resistance to corrosion Detail： High precision internal thread ensures close connection with bicycle hub.smooth rotation and easy maintenance.Hollowing technology to further reduce weight without reducing rigidity,make riding lighter.weight:12.38oz Compatibility: Suitable for Road bike ,MTB ,BMX and so on , Compatible with VG Sports /Shimano and SRAM transmission system. About VG Sports：VG Sports is a professional manufacturer of bicycle accessories such as bicycle chain and bicycle flywheel. The products are suitable for all kinds of mountain bicycles, road bicycles, commuter bicycles and racing bicycles. The products are compatible with VG sports / Shimano / SRAM ，If you have any questions,please feel free to contact us,we will provide you with quality service and caring answers.