This part is a part of the Razors Superlight (SL) type skates. The Backslide plate is the little block of plastick on the outside and bottom of the boot and is used for grinding.

There is only one size backslideplate and it is used for all sizes SL Skates

If you are not sure if this part will fit your skate, or if you are not sure what size to order, then you are always welcome to send us a message.