IBM 3590 J Cartridge 1/2?, 10/20GB, P/N 05H4434 Additional part numbers this product is known by: IBM 3590 J Cartridge 1/2?, 10/20GB, P/N 05H8158 (Labeled & Initialized w/Tri-Optic Labels) IBM 3590 J Cartridge 1/2?, 10/20GB, P/N 05H8157 (L&I w/Black & White Labels) Searching for a high-capacity and high-performance cartridge tape option for your organization? The IBM 3590 Extended High-Performance Cartridge Tape is without a doubt a powerful and reliable option