The 2" Triclover (TC) long solder flange is typically welded into a sidewall of a vessel where you need a port. If you're building a brewery based on the sanitary/triclover method of device attachment, you'll have these all over the place. The tube OD is 2", the flange measures 2.5", and the overall length is 1.125". This length is most appropriate when installing using our pull through process and silver solder.