Description : What's the best refill for a Big i Design TI pen?
Last Answer : answer:Welcome to Fluther. If I were you, buying a high-end pen and specifying my own refill / cartridge, I'd go for the space pen pressurized cartridge. Those things have been great. When I worked in ... , through water, grease and dirt and in any position. And I never had one leak on me, either.