Using 8 x 8 x 16 in. cinderblocks as ballast to avoid damaging roof surface, FRM Series is suited for wireless security surveillance systems, as well as DBS, off-air antenna, satellite internet systems, and point-to-point CCTV signal transmission. FRM-125 features 60 in. mast with 1.25 in. OD, while FRM-166 has 30 in. mast with 1.66 in. OD. In addition, FRM-200 provides 30 in. mast with 2 in. OD. FRM-MAT Protective Rubber Mat is available as accessory for all FRM mounts.