Single hole fastening, diameter 22.5 mm. For e.g. Klöckner-Moeller, Lumitas, Square D etc. Without claws, for screw fastening. Adapter Adapter System M 5184xx Intermediate ring with hinged lid System surface 5164xx Material: brilliant, antibacterial thermoplastic. Smooth and self-disinfecting surface with antibacterial effect. Color similar to RAL 9016. Color: active white, glossy.