Model 0130GC has been specially designed for garbage chute applications. The damper casing is oversized to ensure that the blade stack, fusible link and closure springs are unobstructed from falling waste. The round collar is slightly oversized for direct attachment to the outside of the garbage chute. The design features corrosion resistant steel construction and 100% free area and is available in three standard sizes, 20" dia. (508), 22" dia. (559) and 24" dia. (610), as well as custom sizes.