Upgrade your inline skates and scooters with these premium 623ZZ deep groove ball bearings. Precisely engineered from durable carbon steel, these compact 3x10x4mm bearings deliver whisper-quiet operation and exceptional smoothness. The deep groove design provides superior stability and reliable performance even at high speeds, while the double-shielded (ZZ) construction keeps debris out and lubricant in for sustained performance. Perfect for inline skates, scooters, and various sporting equipment applications where precision rolling is essential. Each bearing is manufactured to tight tolerances, ensuring consistent performance and a perfect fit. This 10-pack of bearings allows you to completely refresh your equipment's rolling capabilities. The robust carbon steel construction stands up to regular use while maintaining smooth operation, making these bearings an excellent choice for both recreational and performance applications.