This Clamp, Wire Press Rfc-33V0 is suitable for Roland RA-640 printers. This is the original Roland part (number 3000000030).
 
Printer compatibility
Roland BN-20
Roland LEF-12
Roland LEF-20
Roland RA-640
Roland RE-640
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 RF-640
Roland RF-640a