550-007 2 x 48 inch industrial belt sander steel platen that's 6.5 inches in height and designed to fit all 2 x 48 inch belt sanders.
Note: 550-006 is now 550-007
563-003 1 x 42 inch sander steel platen is adjustable and used for conventional sanding wood or steel. This metal backing for the 1SM belt is slotted so you can adjust it backward or forward, and it is easily removable.