This military PDA is produced for space agency, main body is made of Bayer nylon+30%gf, which is a rigid and fireproof material, anticorrosive and anti-aging, double injection soft rubber covers most of surfaces to make it, all assembly gaps aresealedwith silicone washer, we are required to produce 100 units, due to high requirements on material, so we choose injeciton molding, not vacuum casting.