This Ring, O P4 is suitable for Roland LEF-12 printers. This is the original Roland part (number 11519107).
 
Printer compatibility
Roland AJ-1000
Roland AJ-1000i
Roland AJ-740
Roland AJ-740i
Roland CJ-400
Roland CJ-500
Roland FJ-40
Roland FJ-400
Roland FJ-42
Roland FJ-50
Roland FJ-500
Roland FJ-52
Roland FJ-600
Roland LEF-12
Roland LEF-20
Roland LPX-250
Roland LPX-60
Roland LPX-600
Roland SC-500
Roland SJ-500
Roland SJ-600