The Crown Products Co Inc 667PCH9 Square to Round Adaptors, Duct Adapter. This product is designed to provide a secure connection between square and round ducts. It is made of galvanized steel with a 26 gauge thickness. The dimensions are 16 1/8" X 18" with 13 7/8" collar for supply air and 16 1/8" X 18 1/8" with 13 7/8" collar for return air.
- Square to Round
- 13.875 in Dia
- 18 in HT
- 16.125 in WD Supply Air
- 17.875 in Dia, 18.125 WD, 16.125 in HT Return Air