Refill for Airpress Ball Point Pen(BC-AP11?? BC-AP41?? BC-AP54?? BC-AP12?? BC-AP20?? BC-AP21)?? Reporter Compact Pen(BC-FSRC/BC-TSRC/BC-WSRC) & Reporter 4 Compact Pen(BC-FSRCV)</br>Ink color: Black</br>Pen tip diameter: 0.7mm</br>