Style: 50' LMR-240 Cell Phone Booster Cable- FME m/fLMR-240 Coax is the same size as RG-8x or Mini-8 cable, about 1/4 inch in diameter. Although it is just a bit larger than LMR-195, LMR240 offers a significantly larger center conductor and supports better signal retention for longer cable runs and higher frequency use. ~Polyolefin is used in blow moulded or rotationally molded components such as heat-shrink tubing for the purposes of mechanically and electrically protecting connections in electronics.