General description 608ZZ Ball Bearings are high-quality speed bearings designed for use in inline skateboards, longboards, waveboards, and scooters. With an ABEC 7 rating, these metal double shielded miniature deep groove bearings provide exceptional performance and precision, making them ideal for racing and other high-speed applications. Technical specifications Material: Carbon steel Dimensions: 8 x 22 x 7 mm Maximum RPM: 34,000 with grease lubrication Usage Suitable for skateboards, inline skates, scooters, and other skating applications Provides high speed and precision for optimal performance Other information Package Content: 20 x 608ZZ Bearings Hand inspected before packing to ensure the highest quality