The Laird / TE Connectivity BB4503R is an all black 11 inch long omni-directional 5/8 wave whip antenna for operation in the 450-470 MHz UHF band, with NMO base. Metal ground plane required. This 3 db gain antenna allows for 100-200W max power output. The BB4503R has a stainless steel whip with an ABS injection molded base around a solid brass insert with a gold plated push pin contact in the coil.