Keystone module cover in white for use as dust protection (set of 4) With the Keystone system there are no limits to the installation. Take advantage of the modular connection system for standardised connectors and rectangular module receptacles (ports) in 14.9 × 17.0 mm pitch. The snap-in system enables a wide variety of connection techniques, e.g. with coaxial sockets for IEC or F connectors, RJ45 sockets (Cat.5, Cat.6, Cat.6A), loudspeaker connectors (cinch sockets, screw and clamp connectors) as well as USB, fibre-optic and HDMI sockets. The individual Keystone modules are universally applicable and interchangeable. Technical data :