This is a side of pole mount for two 60 cell solar panels (39.5" X 65.5" - 17.96 Sq.Ft. MAX) in landscape from General Specialties. These are to be mounted on a 4" post (not included with rack). General Specialties Part Number: SOP-Y-CBuilt for use on 4" SCH 40/80 steel posts. The braces can either be run forward of the panel or back behind which allows greater flexibility in choosing the site for the mount. Panel inclination is controlled through a range of 20 to 90 degrees just by changing the attachment to the brace. All aluminum components of General Specialties Side of Pole mounts are cut from 6061 T-6 extrusions for superior rigidity. General Specialties does not use formed parts out of lighter weight 5052 material as they do not meet our stringent strength requirements. When they say that these mounts are rated for 100 MPH winds, they stand behind that claim. Panel rails feature a proprietary T-Slotted extrusion designed for us for easy and infinite adjustability of panel hardware placement, and extra strength. Zinc plated U-Bolts are provided for standard attachment to 3" schedule 40 or 80 pipe, and Stainless Steel mounting hardware for all panel attachments and parts assembly are included. NOTE: Mount can be upgraded for 5" post attachment for just $45, or a 6" post for $55 - Please contact SPS for a custom quote.