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Exped sleeping mattress coupling female part. Screwed to the collar plug for Drysuit pressure testing.

This goes togeher with our drysuit pressure testing devices - collar and wrist plugs. This female coupler fits the treads of the collarplug. Alternatively it slides over the default coupling of 8.5 mm.

A separate backleak valve can be added in between the eXped and the collar plug. The valve is not fully airproof, but saves time when inflating.