We have a couple of these left in stock and want to move them.  The two we have are 1.5″ inner diameter.  They also use the PES snap connector to connect to your lead wires.  If you do not have the pinch clip, one of our TENS or Banana socket cables with a female snap head work fine to connect this electrode to your existing lead wire.  These cables can be found in our Wiring and Adapter section.