★COLOR: Black★MATERIAL: Polyurethane★HARDNESS: 100D DurometerSet of four CNC lathe fingerboard bearing wheels in Black.CNC wheels are a sensible & economical option for both beginners and seasoned fingerboarders.Each wheel is durable, with a 100D durometer and a smooth finish.Each wheel contains a single metal bearing, enabling the wheel to spin fast and ride smooth.Teak Tuning wheels are compatible with all fingerboard trucks including Blackriver Trucks, Y-Trucks, Dynamic Trucks, and Tech Deck Trucks.