Return Air Box / Register Boot 18.75" x 18.75" Accepts 18" x 18" Return Air Grille. R6 Insulation.
This register box varies in depth 5"- 9.50" Deep O.D. To Flange. CALL US if Depth is a concern

This register box varies in depth 5"- 9.50" Deep O.D. To Flange. CALL US if Depth is a concern

Features
Durable metal construction insulated with a fiberglass back for a choice of collar sizes