Marathon Handpiece BearingsSize: 8mm*14mm*4mm (Inner/Outer/Height) Order No.: RT-B8144 (Old Model:RT-B1480)
Maximum Speed: 50000rpm
For Marathon or Saeshin polishing Handpieces
Front Bearing for 45000rpm/50000rpm handpieces
OEM Number: 1480ZZ
Or any other handpieces which use the same size