TRAVELER'S FACTORY original brass ink cartridge case.
It is crafted from solid brass. The screw-on cap provides an excellent seal, so there’s no need to worry about ink leaks. A ring on the top allows you to attach it to a keychain and carry it with you. If you attach it to the bag you use every day, you’ll have peace of mind even if you suddenly run out of ink. You’ll surely come to appreciate just how ideal a cartridge-style fountain pen is for travel.
S Size: Diameter 12 x Height 50 mm M Size: Diameter 12 x Height 100 mm