Vent Pipe Mount for 2-1/2" to 5-1/2" Vents - (1" to 1.25" Mast Bracket) EZ 70W HIGH QUALITY VENT MOUNT FOR MOUNTING ANTENNA & MAST ON VENT PIPE ATTACHES TO STURDY VENT PIPES FROM 2.50" TO 5.50" OD BRACKET ACCEPTS ANTENNA MASTS 1" TO 1-1/4" OD (MAST NOT INCLUDED) WILL STAND OFF VENT 5"-6" MADE OF 12 GAUGE, 1-1/4" WIDE GALVANIZED MATERIAL