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The BSC PREFERRED MK305RD is a pen-style permanent marker built for consistent, legible marking across a wide range of hard-to-write surfaces. The bold point tip lays down a clear line using fade-resistant, water-resistant permanent ink. The oversized ink reservoir holds approximately twice the ink volume of a standard marker, reducing downtime from frequent replacements. AP Certified Nontoxic. Sold as a case of 12 units, this marker is a practical choice for job site labeling, equipment tagging, parts identification, and general trade use in HVAC, plumbing, electrical, and related service fields.
The MK305RD is suited for general-purpose marking tasks encountered in residential and commercial trade work. It performs on most hard surfaces including metal conduit, PVC pipe, ductwork, junction boxes, equipment panels, and similar substrates. The pen-style form factor fits comfortably in a tool belt or shirt pocket, making it accessible during active service calls. Each case contains 12 individual markers, making it a standard stocking item for shop supply, fleet vehicles, or technician kits.
The MK305RD is equivalent to part number H-734B. Suitable for general marking on metal, plastic, and other hard surfaces common in trade and industrial environments.
No tools or trade license required for use. Store markers horizontally or cap-down when not in use to maintain tip saturation. Keep away from heat sources and open flame, as ink may be flammable prior to drying. Recap firmly after each use to prevent drying.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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