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The BSC PREFERRED MK305BK is a pen-style permanent marker built for trade professionals who need reliable, fast-drying marks on job sites. Featuring a bold point tip, this marker lays down fade-resistant and water-resistant ink that adheres to most hard-to-write surfaces, including metal, plastic, and pipe. The high-capacity ink reservoir holds approximately twice the ink of standard markers, reducing the need for frequent replacement during heavy use. Each case contains 12 markers. The MK305BK carries AP Certified Nontoxic status, making it safe for use in occupied or confined work areas.
The MK305BK is suited for general trade use across HVAC, plumbing, electrical, and pool service applications. Technicians use it to label pipe, conduit, ductwork, equipment panels, and service tags. The pen-style barrel fits comfortably in a shirt pocket or tool bag. Sold by the case, it is practical for service fleets, shops, and supply rooms that go through markers quickly in the field.
General-purpose permanent marker suitable for labeling and marking tasks across HVAC, plumbing, electrical, and pool service trades.
No installation required. Store with cap secured to prevent ink from drying out. Replace cap immediately after use, especially in hot or dry job-site conditions. Dispose of spent markers in accordance with local regulations.
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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