Highly Flexible and Durable nylon polymer Cover Cap, which will provide a high level of protection against contamination inside SCUBA Diving Regulator 1st Stages fitted with a INT/A-Clamp type cylinder connection. Quickly and conveniently attaches to the regulator inter-stage hose using the built in recess provided to avoid loss when not in use. May also be used to protect the charging valves on high pressure breathing air compressors, used to fill SCUBA Diving and other breathing air cylinders fitted with the standard INT – A Clamp fitting. COLOUR: Black.