White O-Card flats for audio cassettes. This shop item includes 100 O-Cards. To buy 500 O-Cards add 5 items to your shopping cart. Make your own audio cassette O-Cards! Made with FSC-Certified 13 to 15 point white board. The board is uncoated so you can use a variety of printing methods - stamps, silkscreen, inkjet. Prescored for easy folding and gluing. |