Want to use an alternate ink cartridge for your Pen Type-A or Pen Type-B?

You'll need a small spacer to fill up the extra space on some cartridges.  You can buy these little spacers here, or cut a piece of tubing or a wooden dowel to the appropriate length. Check below for the appropriate length for your ink cartridge. 

Our favorite alternative is the Pilot Hi-Tec-C Coleto. They're reliable and have a huge selection of colors. Pilot Frixion is also super interesting because it's an erasable ink that works like magic. Check out the video below ↓

 

 

Ink Cartridge	Spacer Length (6mm diameter)
Pilot Hi-Tec-C (BLS-HC25, BLS-HC3, BLS-HC4, BLS-HC5) BLS-HC3 ships with our pens. Here's a comprehensive guide to Hi-Tec-C.	no spacer needed
Pilot G-Tec-C (Identical to Hi-Tec-C, sold outside Japan with fewer color options)	no spacer needed
Pilot G2 (Widely available gel ink)	5mm
Pilot Juice (color gel ink)	4mm
Pilot Frixion (Erasable Gel Ink)	4mm
Pilot Hi-Tec-C Coleto (huge selection)	21.5mm
Zebra EQ (Ultra smooth and vibrant emulsion ink)	2mm
Zebra JF (Highly durable fine tip)	3mm
Uni Signo UMR-82, UMR-83, UMR-85, and UMR-87 (Super smooth edgeless tip)	3mm
Uni Zento	3mm
Muji Gel-Ink	3mm
Uni Signo UMR-109 (Gel ink available in white, black, gold and silver)	16mm
Uni Jetstream SXR-80 (Tip sizes up to 1.0mm)	27mm
Schmidt 6040 FineLiner Fiber Tip (Spring loaded felt tip)	6mm
Pentel Energel	3mm