What is ULTEM® good for? Often used in the production of circuit boards, eyeglasses, food preparation and sterilization equipment, and, perhaps most notably, aircraft parts, ULTEM® is known for its strength and durability Ultem® (polyetherimide) is a semi-transparent high strength plastic material that can operate in high service temperature environments. Uses German Made - Lamy M22 Black Fine FillCAGE : 5VKB6 MADE IN OUR PRIVATE MACHINE LAB Limited Edition Run Of 500 Of Each Pen !!! Welcome, all pen collectors and all-purpose pen users. We are fortunate enough to offer the new Ultem® Pen-Go Pen after recently acquiring a small batch from a government contract. The pen is robust and made to last a lifetime; whether it's on the training field or in the office. A black medium pressurized pen refill, good from -30F to +250F is included. The machined deep grooves provide excellent grip. Perfect to keep on your keys, backpack, desk, purse, pocket and more... Unfortunately, like many of our contracted products, when they are gone, they may not return. Pressurized Ink Cartridge Specifications: Pen : Aerospace Ultem®Pen Refill: Lamy M22 Black Med FillPen Dimensions 2.88" Long x .37" WidePen Weight : .2 Ounces