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 feed 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.
Sizes: .25 mm, .35 mm, .50 mm, .70 mm.
Available singularly and as sets.
Contents: 3 rapidograph pens, 1 Tikky (burgundy) 0.5, 12 hi-polymer HB leads, 1 B20 eraser, 6 ink cartridges, 1 compass attachment.
For tracing paper, vellum drawing paper online board. (Box of 3)
Suitable for tracing paper, vellum, drawing paper and lineboard. Easy-flowing, high opacity, good adhesion. Smudge-proof when dry, not erasable with rotring pencil erasers B20 or B30, light fast, suitable for all forms of reproduction, coloured inks can be mixed with one another, high colour purity.
The highly effective cleaning concentrate is guaranteed to dissolve even the toughest encrusted ink residue.
Mix with 100ml water to obtain cleaning agent for drawing pens used with non-etching inks.
Technical pen for maximum precision with hard chrome plated drafting tube. No drying up of ink thanks to the double sealing system in cap. Steady ink flow thanks to ink collector system. Triple line width colour indication according to ISO and DIN resp. For use on drafting and tracing paper and on matt drafting film. Easy to refill from bottle or with cartridge.
With Mars matic 700 in different line widths: 0.25 mm, 0.35 mm, 0.5 mm and 0.7 mm. With technical pen compass adapter With template attachment for facilitating work with templates. Drawing ink bottle 745 R-9. Plastic case with removable transparent lid, non-slip feet and technical pen holder. Conforming to ISO 9175-1 and DIN 15.

Rotring
http://www.rotring.com/
Staedtler
http://www.staedtler.co.nz/home_co_nz.Staedtler?ActiveID=27591