Kuxuan LED Light up Inline Skates Wheels 72/76/80mm (Pack of 4), Cool Replacement Wheels for Your Rollerblades COOLEST REPLACEMENT WHEEL - Wanna make a little change to your rollerblades? Have a try with our lights up wheels. Led inside the wheels with self-generating power. No battery needed. SPECIFICATION: Material: PU / Durometer: 90A / Bearing Included: 608Z ABEC-7/ Pack of 4. GOOD PERFORMANCE - High quality and improved urethane formula, durable for outdoor uses. ABOUT PACKAGE - Wheels come in Frustration-Free Packaging, Recyclable without excess packaging materials. 100% SATISFACTION GUARANTEE - Buy with confidence due to our 100% risk-free satisfaction guarantee. Reach out to us if theres ever anything you need. We are dedicated to address any product/service issues and is committed to delivering a 5 star experience for all buyers.