This belt is suitable for Roland VS-640 printers. This is the original Roland (part number 1000006725). This belt has an circumference of 172mmm and is 4mm wide.
 
Printer compatibility
Roland RA-640
Roland RE-640
Roland RF-640
Roland RF-640a
Roland VS-300
Roland VS-300i
Roland VS-420
Roland VS-540
Roland VS-540i
Roland VS-640
Roland VS-640i
Roland XF-640
Roland EJ-640
Roland XT-640
Roland XR-640