Rollers Children 90 HD-S, size from 28 to 43 - Shock resistant chassis PP-Reinforced High-Impact Design with Nylon black / white / red hull and TPE-collar nylon Power Strap, Push-lock-loop Casting rebound PU wheels and white top, 82A Bearings ABEC 3 Carbon Wheel size: Size 28 to 31 and 32 to 35 64 x 24 mm, Size 36 to 39 70 x 24 mm Size 40-43: 72 x 24 mm