The 737 really needs no introduction, and the modeling community is blessed with everything from the 737-200 all the way up to the 737-800. Both Minicraft and Daco offer 737-300 and 737-400 kits. Daco also offers a 737-500. Brengun has released this little resin detail set primarily for the Minicraft 737-300. The detail set includes new, crisper wheels/tires, landing gear doors, and a plethora of antennas. The molding is very fine.
The wheels and tires look very similar to the Minicraft parts, but they have a slightly finer edge between the wheel and tire, which makes painting much easier. The landing gear doors are very fine and thin. Take special care removing them from their pure stubs; I was trying to be careful and still broke one of the main landing gear doors. The set of antennas includes more antennas than you would use on a single 737. Take a close look at your references before choosing which antennas to use.