Polish your image with these beautiful, durable stainless steel fittings. Each Thru-Hull and Scupper Valve is available with a new silicone gasket and are backed by Attwood's trusted Lifetime Warranty! Why specify plastic parts when these fittings will last the life of the boatRugged Stainless Construction Cast from certified enhanced #316 Stainless Steel allow for strength and lifetime corrosion-resistance We polish all visible areas to a mirror finish, then each part through a passivation for additional protection Thick steel sidewalls withstand continual stress and hose flexingSolid Silicone Gasket Gasket is dimensionally stable--will not deteriorate or shrink over time Excellent resistance to UV & weather-aging Watertight, fool-proof, one-piece seal Eliminates the need to form and apply sealant or caulk No more chemicals, solvent-soaked rags, or cleanup More than pays for itself in saved labor and cleanup time Guaranteed good looks because the perfect fit and concealment is built in the gasketFaster, Simpler Installation A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface. One installer can tighten all connections from inside the hull Barbed tail ends provide plenty of room to hold multiple clampsCaution: Thru-Hull connectors are designed for installation above the water line only. Lifetime Warranty Hose Size 1-1/8" I.D. Flage Dia. 2-1/4" Thread O.D. 1-3/8" Thresd Length 1-1/4" Barb Length 1" Total Length 2-1/2" Install Hole Saw Size 1-1/2" Thread NP SM 1" Max Hull Thick. (Short 5/8") (Standard 1-3/4") Bulk without gasket 66549-1 Bulk with gasket 66549G1