Multiple manufacturers provide door and window contacts, we use the
George Risk Industries or GRI brand more than any other. There are too
many different types of contacts available to list them all here and there are
contacts designed for just about any application that you can imagine.
Contacts range in size from 1/4" diameter to large garage door floor mounted
contacts. We typically stock contacts for any typical door or window
application that exists but if we run up on something unique, there's almost
always something available that's made specifically for that use. You can
view GRI's web site here.
SEM Security Systems
a division of Southeast Mobility
Door & Window Contacts