Cmple 3 GHz DUAL Ground Block. 2 Ground Screws<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 3 GHz Ground Block (Dual). </span></li><li><span class="a-list-item"> 3 GHz high-frequency ground block. </span></li><li><span class="a-list-item"> Ideal for use with satellite dishes and digital cable. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31x2vDLYdFL.jpg" noproxy>