1 Amp Castelco Push Button Light / Lamp Switch, Single Pole £4.25 Castelco 1 Amp Push Button Lamp Switch 1 Amp Castelco Push Button Switch Fits 10mm Diameter hole Single Pole Can be mounted on to Metal. Suitable for Light Fittings and Lamps. Specification: Mounting Bush with an M10 thread Contact rating 1A 250V ac / 0.5A 250V dc Life 10,000 operations min. at rated load Operating temperature -25º to +70ºC Insulation resistance 50,000 Megohms Proof voltage 2KV min. Contact gap 1mm Comes complete with Long Fixing Ring to fit panel thickness 0.5mm to 3.5mm. These are NOS (New Old Stock) and are extremely difficult to obtain! One they are Gone they are GONE and there will be NO MORE !!!