Screw system is standard. Concealed screw system and plate spring system are available for mounting without hole on frame.
It can be used as air extraction grille in ventilation systems. It can be used with/without damper.
Specially extruded aluminum profile
Wet Paint, Anodized Electrostatic, powder coating
Grille Damper, Plenum Box, Sub frame, Synthetic Filter On The Back
Egg Crate Grilles DTM-03
Egg Crate Grilles DTM-03D