Platt 307 blow molded case. Meet Platt"s low cost solution to Make-Your-Own case needs. These cases are manufactured from prime. High-density polyethylene. With double wall construction. The textured exteriors resist dents. Cracking and scuffs. The shells are unaffected by extreme temperatures. The hardware features mechanical latches that are field replaceable. And a mechanical hinge system that is made to last. All cases meet U.S. 94B Specifications as an electrical insulator and are impervious to chemical attack. Dimensions inside: 11 long. 7 wide. 3.438 deep. Dimensions outside: 12 long. 8 wide. 3.75 deep.