Perko 3/4" Thru-Hull Connection f/ use with Hose BronzeFlange is machined to fit and grooved to retain bedding compound neck isthreaded to approximately 3/16 inch from flange.Cast bronze, plain or chromed brassRegular or short length versionsRegular Length- Fits maximum hull thickness up to 2 inchesShort Length- For thin hull sections up to 5/8 inches maximumTechnical Information Regular Length - Plain Bronze:Hose Size Inches: 3/4Mounting Hole Diameter Inches: 1Maximum Hull Thickness Inches: 1-5/8O.D. Flange Inches: 1-7/8Model Number: 0350005DPPShip Weight: 2.9/5.5 lbs.Made in the USA