1" triclover ferrules measure 1.98" across. I have a quantity of 12 1" triclover hose barbs, that fit a 1" diameter hose. I also have two 90deg. butt weld fittings, they have a triclover ferrule on one end, and just a straight 1" on the other end. These are great for welding into kegs,, etc. The last fitting is a 1" 45 deg. with tri clover ferrules on both ends, I only have one of these. Price is $5.00 each, buy 4 and the shipping is free.