Gauge for checking the internal air pressure on Cressi Pneumatic speargun model SL and SL Star. The gauge is useful for controlling the pressure before going spearfishing underwater. It screws on the back of the speargun allowing easy reading of the pressure in both BAR and PSI. The Pressure Gauge is designed and manufactured in Italy by Cressi, an Italian brand pioneer in freediving, scuba diving, and snorkeling equipment since 1946. The product is covered by a 2-year limited warranty.