Olivetti Electronic Typewriter Lift Off Tapes Models - 6500MD/ETC65/66/ETP55/56/HD550/AH5300/6100/6110/6220/6400 For Model Number(s) - Olivetti, Royal Office Machine - Typewriter Ribbon Type - Tackless Lift-Off Tapes Per Box - 6/Box For Ribbon Numbers - NUKB281