The photo shows an RF splitter used to connect one antenna to two 944-952 MHz radio broadcast STL (Studio to Transmitter Link) receivers.  It is a three-port 50 ohm impedance matcher that consists of two 75 ohm cables cut to a precise length.  A one-foot ruler above the splitter gives a feel for the size.  The antenna input is in the center and has a 50 ohm N female connector.  You can order an N male connector here also.  The charge is the same.  Connectors at the receiver ends are normally N male.  All connectors are made by Amphenol and are standard 50 ohm.  Signal loss from the antenna input to each output port is 3 DB.  This is a direct equivalent to the Marti MTS-1.  The cost is $85.00.

This is a 160 MHz Splitter/Stacking Harness.  You need to specify the frequency or frequencies on this one. These can also be used to feed two Yagi transmit antennas from a single transmitter.  They are sometimes called a "stacking harness."  The power rating is 1000 watts maximum.  Each leg of the assembly is about three feet long.

Receive splitters for 150 to 175 MHz are $95.00.