In addition to Trumbull meter ox lids with custom counter bores, a Solid lid can be used with the under lid AMR and AMI brackets. These backets fit Trumbull solid Polymer  and composite meter box cover lids to hold various AMR and AMI radio transmitters and devices under the polymer cover. Polymer covers are radio transparent. When mounted under lid, they are safe from mowers, trip hazards, snow blades, and curious residents wondering what the device is when you use a counter-bore hole lid.