4 cartridges per box slip-in type for round chart recorder
NSN 6620-01-552-2889
NSN 5905-01-248-3035
NSN 5855-00-791-5000
NSN 5835-01-614-1900
NSN 6145-00-345-2565
NSN 6620-00-936-3463
NSN 6650-00-256-9059
NSN 5960-01-385-4333
NSN 6620-01-486-0937
NSN 6105-01-389-8685
NSN 5920-01-653-4648
NSN 6150-01-469-6393