Oatey 39260 AAV Box Kit 4-1/2" X 5-3/4" for 6 or 20 DFU AVVs With 1-1/2" or 2" adapters New, smaller size: 4-1/2" x 5-3/4" High-impact polystyrene construction Accommodates 6 or 20 DFU AAVs with 1-1/2" or 2" adapters UPC listed Adjustable faceplate mounting with any wall finish provides a lean look New, smaller size: 4-1/2" x 5-3/4". High-impact polystyrene construction. Accommodates 6 or 20 DFU AAVs with 1-1/2" or 2" adapters. UPC listed. White Color For use as a secondary vent One size approved to handle up to 4&#034; vent pipe Opens/closes as needed by building&#039;s plumbing system For use as a secondary vent One size approved to handle up to 4&#034; vent pipe Opens/closes as needed by building&#039;s plumbing system For use as a secondary vent One size approved to handle up to 3&#034; vent pipe Opens/closes as needed by building&#039;s plumbing system New, smaller size: 4-1/2&#034; x 5-3/4&#034; High-impact polystyrene construction Accommodates 6 or 20 DFU AAVs with 1-1/2&#034; or 2&#034; adapters