PCT-F81G F81 RG6 Coaxial Dual Female Splice Adapter Coupler - 6pcs 3/8 in. - 32 UNEF thread with 7/16 in. nut Minimum return loss: -30 dB thru 1 GHz Maximum insertion loss: -0.05 dB thru 1 GHz Precision machined port ends for superior mating performance of F-connectors 6 pcs per bag