THE CIMPLE CO, A Family Company located in the USA, is proud to offer these high quality and durable coaxial screw on / twist on type connectors, also known as coax fittings. F81 Connectors, using the F-Pin connection (standard on US Cable systems). Rated from 2MHz 3GHz, this ensures that the coupler will handle all of the signals for DIRECTV, Dish Network, other Satellite, CATV (including Comcast, Charter, Cox, and more), as well as Antennas, VCRs, Cable Internet Modems, and other digital and analog systems. These will pass signal for 75Ohm coax wires. The connector works with most RG6 Coax, including Dual Shield, Tri Shield, and Quad Shield. Exceptional return loss and insertion loss specifications. Shielding effectiveness is greater than -90dB. We back our product 100%, with easy returns, as well as free technical and customer support.