Allied Moulded AMU1648LF Ultraline Series Fiberglass JIC Size Junction Box, Snap Latch and Hinged Cover with Mounting Flanges and Opaque Cover Gasket made of closed cell neoprene cord encased in a continuous channel 10-32 threaded inserts are installed for optional back panel Ultraguard fiberglass material is easily punched, drilled or sawed UV stabilized for outdoor use Back panels, vent kits, pole mount kits and hole plugs available