Made of stainless steel, durable and strong. Can be installed in a variety of brands and styles of flat shoes, casual shoes. Including adult roller skates and children's roller skates two sizes. Without changing the bracket, remove the wheel directly and install it. Replacement accessories for ice skates. Specification: Material: Stainless Steel Color: Gold / Blue Size: S / L S (Kids) Size: approx. 25.3 x 3.9 x 0.3cm / 9.96 x 1.53 x 0.12inch Replacement for 64mm - 72mm wheels shoes L (Adult) Size: approx. 28.9 x 4.3 x 0.3cm / 11.38 x 1.69 x 0.12inch Replacement for 72mm - 80mm wheels shoes Package Includes: 1 Pair Skate Blades Runners (With 16 Aluminium alloy plug) Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !