Tile switch module， can be uesed for the tilting prevention device. 

Feartures:

Model: LDTR-0007

Working voltage: DC 3.5V- 5.5V

Features distance between the mounting holes: 2.7cm

Diameter of installation hole: 0.3cm.
 

Package included:

1 x LDTR-0007 Tilt Switch Sensor Module For Arduino