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The NEWELL BRANDS SAN37121 is a black ultra-fine tip permanent marker designed for precise identification and labeling on hard-to-mark surfaces. The narrowed tip delivers extreme control and accuracy, making it suitable for detailed marking tasks where a standard fine tip falls short. The alcohol-based ink dries quickly, resists fading, and resists water, producing permanent results on most surfaces. The ink carries AP nontoxic certification. Weighing approximately 0.1 pounds and measuring 6 inches in length, this pen-style marker is compact enough for toolbelts, job boxes, and service vans.
The SAN37121 is well suited for trade professionals who need reliable, legible marks on pipes, conduit, wire insulation, HVAC components, pool equipment, and other surfaces that standard markers may skip or smear on. It excels at labeling small-diameter fittings, terminal blocks, circuit breakers, and equipment tags where fine detail matters. The quick-drying formula reduces smearing during fast-paced service work.
Designed as a general-purpose permanent marker suitable for labeling and identification tasks across HVAC, plumbing, electrical, and pool service applications.
No installation is required. For best results, allow ink to fully dry before handling marked surfaces, particularly on smooth or non-porous materials. Cap the marker immediately after use to prevent tip dry-out. Store horizontally or tip-down when not in use to maintain ink flow.
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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