TWSBI Vac700R Fountain Pen F nibTwsbi VAC700R Fountain Pen Transparent resin with smoke finish (semi transparent black) Charging system "vacuum filler (with inverted syringe) with cap of the memory to avoid ink leakage in aircraft or at fast changing temperatures. Steel fountain pen, writing grade: F (fine) Dimensions: Pin housing use 134 mm, closed 147 mm, with rear cap 175 mm.