BRADY M4C-187-342 Heat-Shrink Wire Marker Cartridge, White Sleeve with Black Print, 3:1 Shrink Ratio, 2.13 m Roll, for BMP41/BMP51/BMP53/M511

Electricians and panel builders rely on the Brady M4C-187-342 cartridge to produce permanent, legible wire markers on demand. Load it into a BMP41, BMP51, BMP53, or M511 printer and print directly onto B-483 polyolefin heat-shrink sleeves. The white sleeve with black print delivers high contrast, and after shrinking with a heat gun, the marker conforms tightly to the wire for a clean, professional finish.

Key specifications

• Material: B-483 heat-shrink polyolefin, 3:1 shrink ratio
• Colour: white sleeve with black print, matte finish
• Wire gauge compatibility: 16 to 10 AWG (wire diameter 2.54–4.06 mm / 0.100"–0.160")
• Expanded sleeve diameter: 4.75 mm (0.187"); recovered diameter: 1.57 mm (0.062")
• Roll length: 2.13 m (7 ft)
• Print technology: thermal transfer
• Operating temperature: -55°C to 135°C (-67°F to 275°F)
• Compatibility: Brady BMP41, BMP51, BMP53, M511 label printers

Why choose it

The B-483 polyolefin sleeve provides a durable, seamless wrap that resists abrasion, chemicals, moisture, UV light, and weathering. Its 3:1 shrink ratio allows one sleeve to cover multiple wire sizes, reducing inventory. The matte surface ensures crisp, scannable text, and the cartridge is UL Recognized, CSA Accepted, and RoHS compliant for industrial use.

Ideal use cases

• Wire and cable identification in control panels and switchgear
• Marking wires inside machinery and industrial equipment
• Permanent labelling for maintenance and repair operations
• Network and data cable identification in structured cabling

Good to know

Each cartridge is a ready-to-use thermal transfer roll—no ribbon changes or settings adjustments needed. The sleeves are supplied expanded; simply print, slide over the wire, and apply heat to shrink. For best results, use with Brady's recommended printer settings and a heat gun set to the appropriate temperature.