Microtech Knives | Siphon II Lever action pen by Microtech. This unique pen uses a Fisher Space pen refill. Specs: Overall Length: 5" (127mm) Closed Length: 3.59" (91mm) Handle Material: Bronze Apocalyptic Pocket Clip: Tip-Down Weight: 4.06oz (115g) Manufacturer Ref. #: 401-SS-BZAP Country of Origin: USA