Screen Hole for Crank Handle From Inner Edge into Unit 3 1/2"
Fits select Heng's vent models
Heng's Roof Vent Screen Frame
New and Improved design. One-piece seam-less self-centering metal base with interior garnish and wider 1-1/4″ flange & radius corners fits all existing roof openings covering existing screw holes. Covers interior stains left by former garnish rings.
Screen Hole for Crank Handle From Outermost Edge into Unit 4 1/2"