100 Blank White Cassettes C60 (New Old Stock) Discover a set of 100 brand-new, never-used blank white cassettes, perfect for recording your favorite music, audio projects, or archiving memories. These cassettes are new old stock. 60 minutes. Capture your audio in retro style with these high-quality, vintage blank cassettes, perfect for your recording needs. I did not try to record anything in them. Look carefully at the photos before bidding. I will ship safely and immediately after payment.