specification:
<br />condition:100% !!!
<br />color: black
<br />material: plastic
<br />length: about 22cm
<br />thread diameter: 9mm
<br />compatible service: 300 ohms connections
<br />type: 300 to 75 ohms matching transformer
<br />connect:old uhf connector 300 ohms two screws on the back of old tv or off air antenna 300 ohms connector 
<br />to:coaxial f connectors 75 ohms
<br />package included:
<br />2 x matching transformer
<br />
<br />note:
<br />1. please check the size measurement chart carefully before making payment.
<br />2. please allow 0.5-1 inch difference due to manual measurement.1 inch=2.54cm
<br />3. the color of the actual items may slightly differentthe listing images due to different computer sn, thanks for your understanding.
<br />4. instruction is not included.