Porelon 11470 H Series Smith Corona Lift Off Typewriter Cassette, 1-Pack Compatible typewriter mylar ribbon Replaces manufacturers part #'s 21060, 21065, 21560, 21565, 63412, 63420, and 67116 Exceptional light fastness and durable impressions Designed to operate with original equipment identified, and will not void equipment warranty One year (12 months) warranty