The No 4 is larger than the No 2, the No 4 is the same size as the Columbia reproducers. > > I believe the #4 is larger diameter than the #2.> > Thanks for this.> > Andy> > > > I believe I have seen the one-piece gasket for the No.4 , on > > ebay ... is that the same size as for> > the No.2 ?> > I think the seller was British, but can't find him again