Features security for a variety of 4" cone loudspeakers. Manufactured from special self-aging aluminum alloy with a tensile strength of 44,000 P.S.I.loudspeaker grille is reinforced with a perforated CRS stud-mounting plate.Baffle installs with special heat-treated alloy screws which are countersunk to enhance security (special wrench provided).Finished in textured white epoxy.Baffles may be flush or surface-mounted.