2pcs 50 Ohms Signal Isolation Matching Transformer 2:1:1 Or 1:1

Measuring with a fluke meter the primary is 55 to 58 ohm and the secondary is a centre tap 2 x 20 to 25 ohms. the primary is only one tap. The rest of the pins are only for soldering support, also on the primary side the middle pin seem to be a grounding plate .

Please note the colour of the transformer might be different from the pictures. All are potted or covered. Some might be missing one support pin. 

Meter is not included in the sale.