PILOT FRIXION BALL 07 Ballpoint Pen Refill 3-Piece Set. Black Cap Type, Knock Type, Common - Brand: PILOT - Model Name: FRIXION BALL 07 - Type: Ballpoint Pen Refill - Set Contents: 3-piece set x 10 Thank you for looking. I purchased these in bulk but will not be using them, so I am selling them.