The Crown Products Co Inc 667PCH8 Square to Round Adaptors, Duct Adapter. This product is designed to provide a secure connection between square and round ducts. It features a 13 7/8" collar and 16 1/8" x 16 1/8" with 13 7/8" collar. It is made of galvanized steel with a 26 gauge thickness. Here are the key features:
- Square to Round
- 13.875 in Dia
- 16 in HT
- 16.125 in WD Supply Air
- 17.875 in Dia, 16.125 WD, 16.125 in HT Return Air