Product Name: OWS series Waterproof Switch Description: The OWS Series of Weather protected isolating Switches is a robust range of switches suitable for virtually any external application. A safety feature for mounting switches to metal structures is the insulating caps that cover base mounting screws to totally protect them from any live cables. Each units supplied with screwed conduit plugs and screwed reducers for easy connection to 25mm or 20mm conduits and screw caps. Screw caps must be installed to ensure IP Rating.