Profile: GemStar Mfg. produces transit cases, carry cases, reusable shipping cases and rugged rack cases. Our manufacturing process includes forming, rotational molding, drilling, routing, assembly and cutting. Our rotationally molded plastic cases are constructed of tough polyethylene and used as instrument cases, protective cases, computer cases & equipment cases. Our plastic transport cases are constructed of high-density polyethylene. Our custom cases are used for protecting and transporting medical equipment.