Material: his boat threaded fitting is made of marine grade stainless steel 316 , which is sturdy and durable. Customized gasket is more convenient to install Flange O.D:2-1/8"(53mm);Thread Length:Approx: 2-3/4" Horse ID Size:1" The detail size refer to the left picturespls PAY ATTENTION TO THE SIZE Max Hull Thickness:1-1/3" 316 Stainless SteelCombo Stainless Steel Thru-Hull Fitting w/Nut with Gasket for 1" ID Hose (1")

This solid cast 316 Stainless Steel thru hull fitting has a highly polished flange that makes your boat look great!
and the hose barbs fit 1" I.D marine hose. 316 stainless mounting nut included.
These are the original equipment fittings used on many of shore salt water fishing boats!
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NOTE:

Manual measurement has an error of about 1MM-2MM, please understand it!