U-Bolt Kits for 2″ to 6″ Diameter Poles The SunWize Power  & Battery U-bolt kit is used to mount a SunWize Power enclosure or solar array mount to the side of a pole. The kit is available for 2″, 3″, 3.5″, and 4″, 5″, 6″ Sch. 40 pipes. Finishes are available in Stainless Steel, Galvanized, or Zinc Plated options.