This Ring Set, Push-On Cs Cstw-3 100 Pcs is suitable for Roland RS-540 printers. This is the original Roland part (number 31149601).
 
Printer compatibility
Roland AJ-1000
Roland AJ-1000i
Roland AJ-740
Roland AJ-740i
Roland LEC-300
Roland LEC-300a
Roland LEC-330
Roland LEC-540
Roland LEJ-640
Roland RS-540
Roland RS-640
Roland SP-300i
Roland SP-540i
Roland VP-300
Roland VP-300i
Roland VP-540
Roland VP-540i
Roland XC-540
Roland XC-540mt
Roland XJ-640
Roland XJ-740
Roland XF-640
Roland XJ-540
Roland VG-640
Roland VG-540
Roland XR-640