Editing TWSBI Go

Debuting on August 15, 2018, the TWSBI Go is TWSBI's most recent entry to their fountain pen lineup. It is now their most inexpensive fountain pen at ~$20 USD, unseating the 'Eco' for that spot. The Go is a spring-activated, piston filler made from molded plastic, metal spring and features a clear grip and translucent colored body. The cap is also clear with colored finial ring surrounding a red TWSBI finial. The snap cap also posts onto the barrel of the pen via friction-fit.  The cap also features a very small loop which acts as both a roll stop and for attaching to a lanyard  The easily swapped nibs from the 580 are not available with the Go. There is a plastic feed, and the steel nibs are available in XF, F, M, B, and a 1.1 stub. The body of the pen is cylindrical, with a small step to the section. The grip section is round, but tapers slightly towards the nib to a very gentle tripod grip. Both the cap and barrel are minimally faceted.

Dimensions: 134 mm capped, 125 mm uncapped, barrel diameter 14.7 mm Weight: 17 g Ink Capacity: 1.61 ml