The Super Grounding Plate Disc is designed for the MC-750 antenna, providing enhanced grounding for improved signal reception and transmission. (Note: It is not compatible with the yellow radial of the MC-750 antenna.) Lightweight and easy to carry, it ensures stable performance in both field and fixed setups. Before use, prepare a 0.75-square RV wire—a flexible, single-core copper wire known for excellent conductivity—and solder it to the golden metal needles on the disc. Compatible with the MC-750 and other GP antennas like the JPC-12, this grounding disc must be used with a SPIKE (e.g., MC-750 SPIKE or JPC-12 SPIKE). To install, simply remove the screws and gaskets on the SPIKE, attach the disc, and reassemble for a firm connection. This grounding plate ensures a stable, efficient setup, delivering stronger reception and transmission performance wherever you operate. Features/ Technical Specifications: Ground disc diameter: 50MM/1.97INCH Ground disc thickness: 11MM/0.43INCH(include the protruding parts) The quantity of golden metal needles: 12 The apperture of golden metal needles: 4MM/0.16INCH Ground disc weight: 40G/0.09LB