Holdrite® Aerator Adaptor Box, Series: HYDROFLAME™ PRO, For Pipe Size: 2-1/2 to 4 in, For Use With: #4 Fire Stop Sleeve and #5 Hollow Sleeve, 4 in Height, Polypropylene
The Holdrite® HYDROFLAME™ PRO Series "Aerator Adapter Box" is attached to the underside of the Pro Series cast-in-place firestop sleeves and provides an enlarged void useful for recessed fitting joints in concrete ceilings. UL-Listed accessory when used with HoldRite's HYDROFLAME™ PRO Series Sleeves.