Description: Package include 8 pcs 608RS ball bearing in metal box.Made of high quality carbon steel with long durability with heavy load and strong resistance. The higher the rating, the better the precision and efficiency and our rating ABEC-11 is at the top. All dimensions are standard 22x8x7 mm, and the black chrome shell will not wear or stain. Pre-lubricated balls run more smoothly and run longer than ordinary steel ball bearings. The nylon base can suffer more bump or fall. Rubber cover on both sides, resist outside impact, prevent dust or sand and stone from breaking into bearing, damage ball inside Suitable for skateboard, roller skates, inline skates, scooters, and other skating applications. Specification: Material: Steel Package Includes: 8 Pieces Skateboard Bearings Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.