A small lever actuated micro switch.

Electrical Specs:

3A @125V AC

3A @ 250V AC

Also works in any digital circuit and most DC circuits.

Measurements:

The switch body measures roughly:
L: 0.780 inches (19.81mm)
W: 0.244 inches (6.21mm)
H: 0.419 inches (10.65mm)

The lever length is: 0.990 inches (25.15mm)
But this can be cut to length required.

The electrical contacts are:
L: 0.019 inches (0.49mm)
W: 0.127 inches (3.23mm)
H: 0.168 inches (4.20mm)

The hole centers are: 0.391 inches (9.93mm) apart.

PH-30-18222B