This item is a Brady BMP51 / BMP53 Label Maker Cartridge 0.75" x 3" Black on White.  Its part number is M-12-109.

This item comes as pictured and does not include any additional parts or accessories.

Specifications:

• Manufacturer: Brady
• Part Number: M-12-109
• Product: Label Cartridge
• Label Type: Die Cut
• For Use With: BMP51, BMP53
• Color Background: Black, White