Master Models is a company that makes turned brass aftermarket parts, specifically pitot tubes, refueling probes, and antennas.
The first thing I would like to point out is how good the packaging and instruction sheet is. The packaging consists of a zip-lock type bag while the part is in a smaller bag, keeping it from moving all over. The instruction sheet is very clear and easy to understand, only needing 3 steps. Cut off original part, Drill a hole (0.3 mm), Glue in the new metal part. Just be careful drilling the hole, especially in 1/72. You have to put each antenna group together which includes 3 parts. Mine got a little bent because of how small they are. I needed to use my visor with the highest magnification. Others will probably have an easier time than me if they are used to putting such small delicate parts together.