Dark Wolf Professional Skateboard Bearings 8pcs ABEC 9 Speed Stainless Green Brand: Dark Wolf. Type: ABEC-9 Speed chrome steel bearing. Material: chrome steel. Stable, durable, anti-corrosion, wear-resistant, dustproof and stainless. Slight noise and good anti-swelling property. Dimension: Approx. 22 x 7mm/0.86 x 0.27