Omron Yellow Round Push Button Lens

Each switch has two sets of SPST contacts, one normally open and one normally closed, permitting a wide variety of switching functions to be carried out
A complete assembly requires a switch unit (or indicator), a lens and a lamp, each of which must be ordered separately
The lenses contain a removable legend plate, which may be marked by the user
Lamps can be changed from front of panel
Matching indicators

UL, CSA