Economy Roof Mount for Masts up to 1-3/8" OD - EZ 17 Antenna Mast Peak Mount ACCEPTS MASTS UP TO 1-3/8" FEATURES 18 GAUGE FEET, 18 GAUGE MOUNTING TUBE. DESIGNED FOR MOUNTING MASTS ON FLAT OR PEAKED ROOFS. ALLOWS MASTS TO BE SWUNG UP ALONG THE RIDGE OF THE ROOF MAST IS HELD SECURELY IN PLACE WITH 2 SET SCREWS. ((GUY WIRE, LAG SCREWS, AND GUY SUPPORTS ARE NOT INCLUDED. THE MANUFACTURER DOES NOT PROVIDE INSTRUCTIONS FOR THIS ITEM))