Ferrite snap-on noise filter. Black plastic case with split core material. Clamps around cable up to 7mm Dia. and blocks noise.
Frequencies from ~10MHz to above 500MHz.
Impeadance: ~40 ohm @ 10-100MHz
~80 ohm @ >100MHz
L: 1-3/16" (30mm) DIA: 5/8" (16mm) WT: .02