BRADY BMP41/BMP51/BMP53/M511 Label Cartridge, PermaSleeve Heat-Shrink Polyolefin, 38.1mm x 2.44m, White with Black Print, 3:1 Shrink Ratio, B-427

Field technicians and panel builders rely on clear, durable wire and cable identification in demanding industrial environments. The Brady M4C-375-595-WT-BK label cartridge delivers exactly that: a heat-shrink polyolefin sleeve that permanently marks wires and cables with crisp black text on a white background. Designed for use with Brady BMP41, BMP51, BMP53, and M511 label printers, this cartridge contains a single roll of PermaSleeve material (Brady material B-427) that shrinks to a 3:1 ratio when heated, conforming tightly to the wire insulation for a professional, long-lasting finish.

Key specifications

• Material: PermaSleeve Heat-Shrink Polyolefin (Brady B-427)
• Label colour: White with black print
• Label width: 38.1 mm (1.5 inches)
• Label length: 2.44 m (8 feet) per roll
• Shrink ratio: 3:1
• Wire gauge compatibility: 16–10 AWG
• Operating temperature range: -55°C to 135°C (-67°F to 275°F)
• Print technology: Thermal transfer
• Finish: Matte
• Adhesive type: Non-adhesive (shrinks to fit)
• Resistance properties: Abrasion, chemicals, fuels, oils, solvents, UV light, weather, humidity
• Compliance: RoHS compliant, UL Recognized, CSA Accepted

Why choose it

This cartridge eliminates the need for separate ribbon and label rolls, simplifying inventory and reducing changeover time. The PermaSleeve material is engineered to withstand harsh conditions, ensuring that wire and cable markings remain legible even after exposure to chemicals, UV light, and extreme temperatures. The 3:1 shrink ratio provides a secure, tight fit on a wide range of wire sizes, preventing slippage and maintaining identification integrity.

Ideal use cases

• Wire and cable marking in electrical panels and control cabinets
• Datacom and network cable identification
• Industrial equipment and machinery labelling
• Panel identification in manufacturing and processing facilities
• Maintenance and repair operations requiring durable, long-lasting labels

Good to know

The cartridge is designed for easy insertion into compatible Brady printers, with automatic material recognition for optimal print settings. The white background provides high contrast for black text, ensuring readability even in low-light conditions. Each cartridge contains one roll, sufficient for numerous labelling tasks. For best results, use with Brady's recommended thermal transfer ribbon series R-4300, which is built into the cartridge for convenience.