"FLEX" hinges are molded modified polypropylene hinge designed for RC airplane use, only in natural colour.A thin hinge line provides superior flexibility but can not be torn. Secure with a few drops a cyanoacrylate glue. Micro size is suitable for free flight, micro RC models. Round shaped (MPJ 2516, 2517) is for easier and stronger installation. The slot for this hinge can be produced by circular saw. 12pcs