The SXBP-300+ from Mini Circuits is a Band Pass Filter with Frequency 290 to 310 MHz, Center Frequency 300 MHz, Insertion Loss 3.5 to 4.5 dB, Power 0.4 W, VSWR 1.30:1, 1.57:1. Tags: Surface Mount, Lumped Component Filter. More details for SXBP-300+ can be seen below.