H30, H20 and Channel Master 1620, 1630, 1640, 1650, 1820, 1830, 1840, 1850 Telescopic Push Up Antenna Masts or ANY TV Antenna Mast like the CM-1607, CM-1610, CM-1805, CM-1810, EZ 5-16, EZ 5-16S, 3S-5999 and 3S-5994 from 1 to 2.00 Inches in Diameter (Mast not included). Set of (2) comes with Installation Hardware. Guy Wire Support for Mast Sections 10 Feet and greater above this mount will still be required. Adjustable for Clamping Any Antenna Masts from 1 to 2.00 inches in Diameter. This Bracket will Stand off any Antenna Mast within this Diameter range, but is not designed to support the weight of any Telescopic Antenna Mast off of the Ground. Guy Wire Support for Mast Sections above this mount will still be required. Bonding should be made by affixment to Mast. Consult NEC and Applicable Local Code for further guidance (Set of 2 brackets includes 2 inch Lag Bolt Hardware).