Fisher Space Pen Backpacker Aluminum w/Key Chain Space Pen Black FSPBP-B. The Backpacker Space Pen also includes a carabiner making it easily attachable to a belt loop back pack purse climbing pack briefcase or anything else that is within your reach. This pen is a fantastic choice for all kinds of people Simply pop it on your keychain and youll always have a quality writing instrument at hand. Students love this on their school lanyard as well Specifications for Fisher Space Pen Backpacker Aluminum w/Key Chain Space Pen: Manufacturer: Fisher Space Pen Fabric/Material: Aluminum Length: 5.41 in Features of Fisher Space Pen Backpacker Aluminum w/Key Chain Space Pen: Style: Backpacker Pen - Key Ring Space Pen Finish: Orange Anodized Aluminum Cartridge: Fisher PR4 Black Ink Medium Point Package Contents: Fisher Space Pen Backpacker Aluminum w/Key Chain Space Pen Fisher Space Pen FSPBP-B: Backpacker Aluminum w/Key Chain Space Pen Black