Rapidograph 4 Pen Set
this pen set from MisterArt.com (click
These technical pens are practically maintenance free and give more
consistent reliable performance than other technical pens. The secret
is a unique disposable cartridge. The cartridge acts as a storage
area for ink and as the vent channel for the ink to be fed to the
nib. Once the cartridge is finished you replace it with an entirely
new venting system. This makes the Rotring Rapidograph the easiest,
most reliable, refillable technical pen available today. Stainless
Steel nibs. Pen Sets - each set includes a pen holder for hand lettering
and threaded, pen-compass attachment.The quality of more expensive
refillable technical pens with the convenience of a disposable all-in-one
ink cartridges/air channel system. These pens are ideal for comic
book artists, letterers, architects, designers, engineers and hobbyists.
Sizes: .25 mm, .35 mm, .50 mm, .70 mm.