Check the listing for details. Radiator Compression Fitting -16AN; NO WELDING REQUIRED; 1.25" Diameter. Condition: New. Listed at 139.95 USD. Radiator and Water Pump Clamp on Compression -AN FittingRequires radiator inlet/outlet of 1.25" (1.2" to 1.35")Avoid the hassles of welding while gaining the functionality of -AN fittings when it comes to plumbing your new engine! CVF's patent pending Radiator Clamp on Compression -AN Fittings brings you the strength of a weld but the functionality and ease of a bolt on fitting! Avoid hose clamps on your water pump by using the same compression fitting on the inlet! These fittings begin with a simple clamp and O-ring but then allow for additional compression to give you a rock solid connection rated for at least 120 PSI and pass all -AN standards!Each kit includes:Clamps for 1.25" radiator inlets/outlets w/ hardware-16AN fittingCompression RingO Ring Restrictions:1.25" clamp will fit radiator inlet/outlets from 1.2" to 1.35"Lip on the radiator must have a diameter LESS than 1.68"Check out our Ebay Store for more AN Compression fittings! We have products to fit everything from a 1.2" to 2.0" Inlet/Outlet in -16AN and -20AN Fittings