Rite In The Rain All-Weather Pen Refill - Blue 3 1/2. 5" Ink Refill keeps your All-Weather Pen running strong. If your old pen runs out of ink don't replace it - refill it and keep on writing in the rain. The Rite in the Rain Black Ink All-Weather Pen Refill retains all the same properties as the original ink cartridge - it writes upside down in the rain and in a bigger temperature range than you're ever likely to need. Specifications for Rite in the Rain All-Weather Pen Refill: Size: 3 1/2 in long Weight: 0.02 lbs Features of Rite in the Rain All-Weather Pen Refill: Black Ink Package Contents: Rite in the Rain All-Weather Pen Refill Rite In The Rain 47R: All-Weather Pen Refill - Blue 3 1/2. NSN:7510-01-544-9469