Content Container Nailor’s maximum security grilles and registers are constructed from heavy gauge welded steel and are for use in areas where maximum security is vital. These grilles can be used for both supply and return air applications. Models SG-LM - Lattice w/Mesh Screen SG-PR - Perforated Face Submittals Individual Submittals Model SG-LM • Maxium Security • Steel • Lattice Face and Mesh Screen Performance Data SG-LM • Supply SG-PR • Supply Catalog