Heavy Duty 15A Momentary (On)-Off-(On) Toggle Switch. High quality 3 position (on)-off-(on) Toggle switch. These switches have a momentary action and so they spring back to the centre off position when released. These switches are ideal for many applications including power switches or for use in cars, boats, hobbyists etc. (Please click here if you require the waterproof covers for these switches) APPROX SIZE: 33mm x 16mm x 54mm(L x W x H) PANEL HOLE SIZE: 12mm PINS: SPDT 3 Pin. MAX RATING: 15A 250VAC WORKING VOLTAGE: 12V DC TYPE: KN3C-123 I am a fully qualified electronics engineer with over 30 years experience, so please contact me if you have any questions and I will get straight back to you. Thanks for looking.