Parker Med Blu Rollerball Refil Pk12 Power Tools & Accessories The clear viewing window gives

The clear viewing window gives the user the ability to see debris build up and a lock on switch reduces fatigue during sustained use

it includes multi-positionable plastic tabs and printable card inserts

19 and 21mm

making it easier to loop up and transport

Parker Med Blu Rollerball Refil Pk12 Power Tools & Accessories The clear viewing window givesThis refill is designed with Parker Rollerball FreeInk technology, providing a high level of performance with a consistent and fluid writing experience every time. For use with Parker rollerball pens, simply unscrew the pen's cap, remove the empty cartridge and insert a fresh refill for continued use. This pack contains 12 medium blue refills.