Overhead Concealed door closers are used to provide a more aesthetic look to the opening.
Concealed in either the frame or the door
Offer the ability to be adjusted to maintain control o...
Standard Doors: standard inverted bottom channels will accept the following manufactures automatic door bottoms:
National Guard (320)
Pemko (420)
Zero International (355/354)
Special (custom) option: a special/optional end channel that will support the following manufactures:
National Guard (422/423/522)
Pemko (443)
Zero International (360/364).