Steel Single Deflection Return Grille with ¾” blade spacing, 35° fixed deflection, Blades parallel to the long dimension

Gripple - Cracked Concrete Ceiling Anchor - Max SWL 117lbs - 1/4" hole dia - hole depth 3/8" - Anchorage depth 1"

The FSDR-512 is a round combination fire smoke damper with round blades. This model installs in walls, floors, and partitions and is rated for airflow and leakage in either direction.