Wolf Tooth's single speed spacer kits are compatible with Shimano HG type 10 or 11-speed freehub bodies and provides riders with the ability to adjust their chainline as needed.Kit includes: (1) stainless steel lockring, (2) 1.5mm aluminum spacers, (3) 5mm aluminum spacers , and (1) 15mm aluminum spacerStainless steel lockring for durability and corrosion resistancePremium 7075-T6 aluminum spacers offer strength and light weightItem weight: 44gCompatible with any 10 or 11-speed HG freehub bodySpacers can be used in combination to achieve 45, 47.5, 49, 52, and 55mm chainlinesMade in the USAItem SpecificationsCassette Body TypeShimano HGMaterialAluminumMaterialStainless Steel Wolf Tooth Single Speed Spacer Kit Driver and Single Cog UPC: 812719029438