Feature:1. Carbon steel material: Made of high quality carbon steel, with high hardness, high load capacity, smooth surface and corrosion resistance. 2. ABEC 11 bearing: The use of bearings with standard ABEC 11 specification, high accuracy, low noise, uniform speed when working with high efficiency. 3. Good performance: 608ZZ ABEC 11 bearing ma stable performance, good coordination with machines and better working efficiency. 4. Wide range of applications: 608ZZ ball bearing can be used do twisting cars, rollers, dance boards, skateboards, etc. 5. Wear-resistant: The bearings are resistant to wear and tear when operating at high speeds. Metal sealed lid to prevent contaminants from entering. . 8pcs 608ZZ ABEC 11 steel ball bearing . 8pcs 608ZZ ABEC 11 steel ball bearing Specification: Item Type: 608ZZ Ball Bearing Material: Carbon Steel Inner diameter: Ok. 8 mm / 0.31 inch Outside diameter: Ok. mm / 0.9in Thickness: Ok. 7 mm / 0.28 inch Weight: Ok. 92g/3,2 oz . 8pcs 608ZZ ABEC 11 steel ball bearing . 8pcs 608ZZ ABEC 11 steel ball bearing Package List:8 x Bearing . 8pcs 608ZZ ABEC 11 steel ball bearing . 8pcs 608ZZ ABEC 11 steel ball bearing