All-Weather Pen Refill Black 37R

3 1/2" long. Black ink. Fits all All-Weather Rite in the Rain pens. Writes in any weather. Write at any angle, even upside down. Pressurized cartridge. Extreme temperatures: -30°F to 250°F. Skips less - writes over water, grease, fingerprints and photographs. Hang packaged.