Good material: Polyurethane (PU), high quality wheel, reduce excessive abrasion. Durable, stable and quiet to slide quickly and smoothly 608 RS ABEC-9 chrome steel bearing allows high speed to be achieved. Parameters of the set: wheel - diameter 52 mm, width 32 mm 608 RS and ABEC-9 bearing 22mm outer diameter, 8mm inner diameter, 7mm width. 95A Skate Wheel: 95A hardness and 80 percent rebound, hard wheels for playing tricks good to use on the street, skate parks, skatepark bowl, rink, on ledges, gaps, hand rails and pads, etc. Perfect for most skaters also beginners. Ideal replacement wheels: suitable for many skateboards such as Skateboard Pennyboard Snakeboard Cruiser Board etc. Could also be used for quad roller skates. Good choice as a gift on birthday, Christmas and New Year. Package includes: 4 x 5232mm wheels and 2 x 3mm joints and 8 pairs of 29mm deck nails and a T-tool Picture is for reference only, please refer to the actual product information ! ! ! (excluding roller skate) Product Name: Skateboard Wheels Material: PU Color: Black Size: approx. 52x32mm (as shown in the picture) Mass: approx. 470g Quantity delivered: Pack of 16 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.