7075 aluminum alloy is used, which has high strength, good compression , long-lasting stability, beautiful and generous products, and lightweight while maintaining strengthThe edge adopts anti loosening ratchet design, multi-directional protection, locking with the flywheel for more securityCNC cutting, clear water caltrop, clear tooth pattern, no burr, high overall strength, locking without falling offIt adopts the general standard specifications in the market, with strong compatibility, easy installation and high strength lifeColour:Red+silverMaterial:7075 aluminum alloySize:Bicycle Cassette Cog Diameter: 46mmBicycle Cassette Cover Diameter: 35mmPackage Contents:1 x Bicycle Cassette Cog1 x Bicycle Cassette CoverOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.