Maxell DLT III XT Data Tape Cartridge 15/ 30 GB, Part # 183570 Compatible with the following recording formats: DLT 2000XT, 2500XT, 2700XT 4000, 4500, 4700, 7000 & 8000 drives Capacity Uncompressed Capacity:15 GB Compressed Capacity: 30 GB Maxell Part Number: 1183570 Tape Length: 1828 ft / 557 m