The finish of the product is much better than shown in the Revain photos. It is designed for T18 soldering iron, but can be used with a small spacer, 4mm inner diameter, 6mm outer diameter, 2mm height, such as. B. McMaster 93295A002, to fit 900M soldering irons, or simply cut the ring off the base of the 900M tip and use as a spacer (shown in the attached pictures). I have been using the mcmaster 92160A119 insert tip for many years and based on my experience I would like the dimensions of this…