12V - 24V 16mm Rot LED Metall Hoch Rund Drucktaster Momentschalter Wasserdicht
Cutout 16mm. LED rated as 12v to 24v but works fine from 9v up. Waterproof IP67. Switch up to 36v 2 amp. These are high quality switches which cost £13.53 from Diamond Electronics Ltd, the UK importer.