Forty-five years of experience developing pneumatic spear guns lead Mares to introduce the Sten-11. The superior performance of its 11mm diameter internal barrel combined with the Sten line guns' absolute reliability and attention to every detail resulted in the production of the best pneumatic spear gun in the world. All lengths share highly sensitive release mechanisms. The 100 and 110cm models are equipped with a 7mm stainless steel Tahitian shaft while the rest are provided with a 7mm spring steel shaft. All models have a power adjustment system and come with a special carrying case.