High Quality, extra durable nylon polymer protective insert cap cover to fit SCUBA Diving or Air Gun Cylinder valves with female EN-144-3 Type DIN outlet fitting with a G5/8”thread. Protects & prevents contamination of the DIN outlet fitting, helping extend the life of the Cylinder Valve. Can be quickly and easily attached to a Cylinder Valve with the supplied cord, simply loop around the valve neck. The cord is simply removed, should it not be required, also suitable for use to provide protection and minimise the risk of damage to Air Filters and Air Gun components with female DIN threads. COLOUR: Technical Black.