Italian Ice is an acrylic material which appears clear in some light, and features a lavender glow in UV light. Note that as the pen ages, it may develop "micro fractures" inside the material giving it a "cracked ice" look, so consider this as you purchase.
The Model 31 fountain pen encompasses features from several F-C models. The grip section is like that of the 40 Panther, the silhouette is a slightly slimmer version of the 19, precision posting like the 20, 45, and 03, cut grooves and recessed nib like the 20.
.625" cap diameter (15.87mm)
.531" upper barrel diameter (13.49mm)
5.50" capped length (139mm)
6.755" cap posted length including nib (172mm)
5.250" barrel length including nib (133mm)
.42" grip section at thinnest point (10.67mm)
Weight without ink = .92oz / 26.0g
♦ Made in USA of long lasting, durable hard acrylic that is light weight.
♦ Standard Int'l Cartridge / Converter filled, one of each included. Also can be used as an eyedropper. Barrel holds approximately 3.5ml of ink when eyedroppered.
♦ #6 Size nib - with many tip options in factory or custom ground.
♦ Lifetime Warranty.
♦ Shipped with a Franklin-Christoph one pen zippered pouch and outer white box.