BrassCraft CSSB1412-12 ProCoat 1" FIP x 1" MIP x 12" Stainless Steel 3/4" I.D Gas Connector (290,900 BTU) 3/4 in. I.D. (7/8 in. O.D.) corrugated stainless steel with corrosion resistant coating Steel fittings included: 1 in. Fip and 1 in. Mip (tapped 3/4 in. Fip) Procoat coating corrosion resistant to harsh chemicals as well as uv rays and salt