The Sten spearfishing speargun is a pneumatic speargun with 13mm barrel . Ergonomic handle and brand new ultra light and compact head, greatly improving buoyancy and hydrodynamics. Reinforced ogive with steel wire pass and ultra-light compact head, for better buoyancy and hydrodynamics. The 13mm inner barrel allows you to use 7mm and 8mm rods. The main features of the Sten pneumatic speargun are: • 40 mm outer barrel • Lightweight one-piece muzzle • 13 mm inner barrel • Reinforced spinner with steel line guide • Ergonomic handle with white grip for greater visibility • 8 mm threaded rod Sten – a legendary name. A speargun that is known and appreciated by all spearfishing enthusiasts for its characteristics of precision, power and reliability. The Sten is one of the finest pneumatic spearguns on the market, optimized for superior performance in a wide variety of spearfishing conditions. The first Mares Sten was created in 1967. The Sten has since become the best dive buddy of countless spearfishermen around the world, who appreciate its precision, power, and reliability. In addition to sharing many features with the Sten 11, this model uses a two-piece head and 8-mm diameter shaft with threaded tip. • Rigid Ergonomic Handle • Patented Side Line Release • Patented Safety Catch • Harmonic Steel Shaft (8mm Diameter / 7mm Male Thread) • Hydrodynamic Line Retainer • Technopolymer Shock-absorber Bushing and Piston • High Capacity Air Tank Double Barb Tip, Retaining Line, Rubber Line Shock, Shaft, Shaft Loader, Recharging Pump, Leg holster (only the 41cm) The Sten series allows the use of 8 and 9 mm shafts, even for the most demanding spearfisherman. Includes pressure adjusting pump, tip, shock cord and shaft. Sten Mini Mini includes hip holster