Roller Derby Boys' ION 7.2 Adjustable Inline Skates Soft boot with deluxe comfort liner. Bungee lace, hook-and-loop strap, and power strap closures . Push-button adjustable sizing. Aluminum frame. Silver-7 speed-rated bearings. Urethane wheels. Small: Fits sizes 11J-1; 64 mm wheels. Medium: Fits sizes 2-5; 72 mm wheels. Model: I145B. Imported.