adjuster function,aluminum frame.PU wheel.inline skate. 1:Boot,soft boot with high density nubuck ... pp,chassis-aluminum 2piece chassis.3:Wheel,PU casted transparent wheel 64*24mm 80A ,PP wheel core.4:Bearing,ABEC-7 chrome ... steel bearing.5:Size,35-38#,39- ... carton,container loading is 1100pairs per 20GP. roller inline skate