This is one each of New (old stock) Mini-Circuits Wideband Surface Mount Power Splitter/Combiner 4-Way 0-Degree, 75 Ohm 10-1000MHz, Part Number: SCP-4-4-75. Mini-Circuits list price for $28.95 each.

General Spec for SCP-4-4-75:

• Wide Band RF Frequency: 10MHz - 1000MHz
• High Isolation: 32dB (typ)
• Excellent Amplitude Unbalance: 0.4dB
• Low Insertion Loss: 0.65dB (typ) above 6dB
• Operation Temperature Range: -40C to +85C
• Surface Mount Package: Case Style YY161

http://minicircuits.com/pdfs/SCP-4-4-75.pdf

Test Data and Plots:

http://minicircuits.com/pages/s-params/SCP-4-4-75_VIEW.pdf

http://minicircuits.com/pages/s-params/SCP-4-4-75_GRAPHS.pdf