Tuff-Writer Frontline Series Generation 2 Tactical Pen Black Two Lengths: 6.50 inches; Thickness: 0.5 Inches; Weight: 1.6 oz. Finish: Proprietary non-reflective / non-marking surface treatment and hard anodized to Mil-A-8625 F specifications Color: Midnight; Material: 6061-T6 Aerospace Grade Aluminum Fittings: Black oxide stainless steel bolts and chemical welding; Cartridge: Fisher #SPR4 / Foray #877294 Clip: Cold Pressed Spring Steel with non-reflective textured powder-coated finish