AC Infinity Ducting Collar, 4-Inch, Galvanized Steel AIR FILTER BOXES With each pass through the

With each pass through the pleated furnace air filter

inner diameter hose size

Fully autoclavable

Curved shorter lip maximizes grow space when multiple tables are aligned

Exempt from Federal Insecticide

AC Infinity Ducting Collar, 4-Inch, Galvanized Steel AIR FILTER BOXES With each pass through theDescription Steel Ducting Flange: This ducting flange is designed to be used with applications such as tumble dryers, bathroom fans and range hoods. The flange boasts crimped rims and a raised lip on the duct opening, improving grip on ducting. Design Features: The design includes a flat brim that lays flush against all flat surfaces, creating an airtight seal to keep particles out. Made of galvanized steel, the flange is not only corrosion resistant