Pencils will work great on Rite in the Rain but sometimes you just need a pen. This All-Weather Silver Metal Pen writes on wet paper and upside down, the pressurized ink cartridge performs in temperatures from -30F to 250F. The ink won't leak, evaporate or blow up in your pocket! 5 1/4Ó open (with cap attached to end), 3 3/4Ó closed, barrel diameter of 3/8Ó. Black Ink.