All the stationery in my shop is drawn from my own holster. Sharing my illustration toolbox with you, these items are my personal favourites, go-tos for myriad illustration and lettering jobs.
 
Does the job of several pens! Water-based black ink in a glittery grey and gold casing.
 
Straight from Japan this is a 'fude' ('fudenosuke') or brush pen, and has a fine, marvellously versatile, tapered fibre tip.
 
[Pocket brush pens can have rubber, fibre or real or synthetic hair/bristle-based tips, and have a marker pen-style body and ink delivery system. Felt or rubber tips tend to be firmer, while bristle tips are soft.]
 
Designed for one-time use (alas not refillable).