Lionsteel Nyala Pen Carbon Fiber Blue Nyala Twist Pen 4.5in Overall Carbon Fiber Insert Uses Fisher Space Pen Pr4 Cartridge Titanium Construction Blue. 4.5" overall. Matte finish. Carbon fiber insert. Uses Fisher Space Pen PR4 cartridge. Titanium construction. Color: Blue. Boxed. Specifications for Lionsteel Nyala Pen Carbon Fiber Blue: Manufacturer: Lionsteel Color: Blue Package Type: Box Overall Length: 4.5 in Finish: Carbon Fiber Package Contents: Lionsteel Nyala Pen Carbon Fiber Blue Lionsteel NY FC BLS: Nyala Pen Carbon Fiber Blue Nyala Twist Pen 4.5in Overall Carbon Fiber Insert Uses Fisher Space Pen Pr4 Cartridge Titanium Construction Blue Blue