Charmilles Part #130003173 (old #449329) For Robofil 290, 300, 310, 500, 510, 690; 50mm(OD) x 8mm(ID) x 24mm(Thk) Charmilles Wire Drive Roller for Tim Head w/ 4 grooves - Right side, TiN coated Also available in Extended Life version, last +30% long, #SPK-C006-1L