27-9050
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38743140-27-9050
Bnc Tw-on For RG-59, 62
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit.
There are 2 different types of 'coil'; one has copper on it (IUD) and the other contains hormone (Mirena IUS). Both are over 99% effective at protecting against pregnancy.