skates wheel: 1.high quality flashing PU wheel 2.onnecting shaft:steel 3.easy to learn and keep fit 4.ABS material Name :skates wheelSuitable:roller skates,skateboard,wheelbarrow, scooter and etcSize:64# and 70# 64X24 AND 70X24inner hole:22mm and 8mmBearing: ABEC-7Material:PU and PVCColour:red,blue,pink,orange,yellow etc skates wheel