Mares Viper Pro Spearguns Optional swiveling band fork adapter, for traditional dual slings. Stainless steel release mechanism in a reversed position, manufactured in stainless steel with highprecision laser cut. Adjustable trigger sensitivity, and on Viper Pro the distance between the trigger and the handle can be customized. Stainless steel side line-releaser and two lateral alligator clips. Speed  6.5-mm tahitian shaft, S-Power Speed  19-mm circular sling, and Vertical Spiro 65 reel on Venom Pro 90 and 75, Vertical Spiro 87 on Viper Pro 100 and 110-cm. Viper Pro is available in 75, 90, 100 , 110 and 120-cm lengths.