I FOUND THIS FRICTION ITEM IN A BOX OF AUCTION ITEMS.  IT HAS NO NUMBERS TO SEE WHAT IT FITS ON BUT IM SURE YOU ARE IN KNOWLEDGE ENOUGH TO KNOW.  THIS PIECE DOES MOVE AND WHEELS MOVE WHEN PUSHED.  ONE WHEEL HAS A LITTLE BIT OF RUST ON IT.  MIGHT BE ABLE TO CLEAN IT UP.  THE TWO RUBBER WHEELS THAT ARE STILL ON THIS PIECE ARE DRY ROTTED BUT STILL ON THE METAL.  BEINGS I DONT KNOW ANYTHING ABOUT THIS ITEM OR WHAT TYPES OF INFORMATION YOU NEED TO USE IT … SEE PHOTOS AS THEY ARE THE BEST SOURCE TO SEE WHAT IT IS AND WHAT IT WOULD GO WITH.  MEASURES 2 INCHES LONG (not including the wheels) x 3/4 inches wide (not including the wheels). THE LIGHT BLUE METAL WHEELS MEASURE 1 1/16 INCHES IN DIAMETER … THE DARKER BLUE ONES MEASURE ONE INCH IN DIAMETER … (including the rubber tires that are on there).  THE SILVER WHEEL IN THE INSIDE IS 1 1/16 INCHES LONG X 3/16 INCHES THICK