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Aluminum "Clamp-It" Mast Clamp, 2" dia | Penninger Radio
Heavy Duty Double Antenna Mast Clamp
2 Pack TV CB Ham Antenna Mast U-Bolt Clamp Support Bracket; Size: 10*6cm | eBay
7arrays Antenna Parts
Double Antenna Mast Clamp V-jaw Bracket U Bolts Pipe Mounting Hardware 2 Sets For Wifi Antenna, Tv | Fruugo FR