ITC (81932SS-HP-DB 3" Stainless Steel Curved Air Flow Vent
This Curved 3" Clad Air Flow Vent includes a permanently attached, corrosion resistant, 316 Stainless Steel cover plate. It is designed to work with 3" or 4" ducting and no fasteners are required for installation. This high quality product is available from ITC, the original manufacturer.