Electric Door NO Exit Release Momentary Round Push Button Switch Product Name : Push Button Switch;Use for : Electric Door Action Type : NO;Contact Type : Momentary Size : 8 x 3.1 x 2.5cm/ 3.1" x 1.2" x 1"(L*W*T);Mounted Hole Dia. : 3mm/ 0.118" Material : Plastic, Metal;Color : Silver Tone Weight : 30g;Standard Structure : 1 x Electric Door Push Button Switch