Thanks to the erasable thermo-sensitive ink: Write, Erase and Repeat! Refilling is economical and more respectful of the environment A practical set of 6 refills suitable for both FriXion Ball and FriXion Clicker 0.7 pensRefills will help you save money over buying new pens, and are also fabulously eco-friendly so there really is no excuse not to refill!Choose your colour : black, blue or assorted and refill your pens or share them with family and friendsPerfect for getting back to school or even back to the office! With this refill pack you can continue writing for as long as your ideas keep flowing... #Happywriting Features Certification CE Suitable for pen type Gel pen Wear-resistant Yes Light-resistant Yes Stroke width 0.35 mm Tip width 0.7 mm Tip material Metal Product colour Black, Transparent Writing colours Black Line size Medium Packaging content Quantity per pack 6 pc(s) Packaging data Package type Blister