The pressure gauge is available in two versions, the first is a simpler gauge with a threaded male insertion designed for OMER pneumatic spearguns. It simply just screws into the back of the gun to measure the pressure. The adapters for other pneumatic guns allow the use of the Pneumatic Pressure Measuring Kits on other pneumatic speargun brands other than OMER. One is a Mares/Seac adapter while a different adapter fits Cressi spearguns. Thanks to the adapter kit all pneumatic airguns can be tested.
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