Welcome to our store. If you love Sports and Outdoor Activities ,we will provide what you want, and give you much surprise.Description: 50 Pcs Standard 10mm best quality alloy spacers Fits stunt push kick scooters, skateboards, inline skates, quad roller skates, roller derby High strength, abrasion resistance, stable, resistance Improve skateboard stability and reduce wheel shake Keep bearings perfect parallel, improve rotating and precision, reduce bearing wear and tearSpecification: Materials: Aluminum Size: Approx. 10 x 11mm/0.39 x 0.43 inch Quantity: 50 PcsPackage Includes:50 Pieces Skateboard Bearing SpacersNote:Please allow 1 3cm (0.4 1.18) difference due to manual measurement and slight color variation for different display setting.Thank you for your understanding, nice day!