Heng's (V971201-C1G1 White 14" x 14" EZ Vent Heng's Industries Clamp-Style Painted Metal Base Vent Features: Self-centering device eliminates installation guesswork and assures perfect alignment in roof opening Exclusive four-screw inside flange mount feature for attaching base garnish to lid mount Saves labor on installation Pure White base screen frame, non-powered vent, White