Premec Pen Refills by Good Stuff Company Good writing instruments keep their promises: They not only look great, they also write that way too. They offer maximum writing comfort, perfect writing appearance and glide gently and easily over the paper. Manufactured in Switzerland, original Premec & Prodir refills. Our refills deliver highest writing comfort and perfect graphic style. The newly developed plastic refill with 0.7 mm tungsten carbide writing ball in a corrosion-resistant stainless steel tip, filled with water based ink, is available in the writing colours Black and is in compliance with the ISO standard 27668-1. Your writing dries noticeably faster than with conventional gel refills. Virtually smudge Free. For a wonderfully light, butter like gliding gel pen feeling and a clean, stable line. Perfect for everyday usage.