10pcs Zebra SK-0.7 0.7mm Refill (Box Set) - Blue Ink

Zebra B-BR-6A-SK-BL Clip-on Oil-Based Ballpoint Pen Refill, SK-0.7 Core, Blue, 10 Pieces

Zebra B-BR-6A-SK-BK Rollerball Pen Refill, Clip-On SK-0.7 Lead, Black, 10 Count

Zebra B-BR-6A-SK-R Clip-on Oil-Based Ballpoint Pen Refill, SK-0.7 Core, Red, 10 Pieces