72 Inch Faucet Water Supply Connector Line Braided Stainless Steel, Faucet Supply Line - 3/8 Female Compression Thread x 1/2 Female Iron Pipe Thread If your duct opening size

If your duct opening size is 12” x 6”

The flexible connector features a heavy-duty corrugated 304 stainless steel tube protected by a durable stainless steel braid and exterior coating for superior flexibility

1" ID × 36"/48"/60" Flexible Gas Connector

2-Pack Red/Blue Lined Industrial Grade Stainless Steel Braided Washing Machine Hoses with Universal 3/4" straight connector on the other end

72 Inch Faucet Water Supply Connector Line Braided Stainless Steel, Faucet Supply Line - 3/8 Female Compression Thread x 1/2 Female Iron Pipe Thread If your duct opening sizeThe Shark Industrial faucet connector features a 3 8 inch comp x 1 2 inch FIP nut connection. It is built to last with premium non toxic PVC core with 304 stainless steel braided outer cover for strength and protection. Unlike other grade of "stainless" steel, 304 is true stainless and rust proof. Our connector hoses are built with high quality which exceeds industry standards like UPS, NSF61, WRAS, and RoHS ONE 304 stainless steel braided premium