1.5" Tri-Clamp x 5/8" Hose Barb

1.5" Tri-clamp x 5/8" hose barb.  304 stainless steel.  Compatible with 1.5" tri-clover fittings.  This barb is measured by the outside diameter.  Can be used with 1/2" silicone, and is probably the best choice for a tight fit without using clamps.