The QB2 Kit with Dual Flashing is an easy and efficient way to mount solar panels to a variety of roofs. Each order includes a minimum of 50 mounts, shipped complete in one case. Sealant is optional, and the kit provides exceptional leak-proof protection with water test results showing no leakage under ASTM E331 @ 15.00 PSF, ASTM E331 (modified) @ 30.00 PSF for 120 minutes, and ASTM E2140 (modified) with a 6" water column for 7 days. To properly compress the QB2, a minimum torque of 150 Lbs/Inch is required. The 10MM x 46MM rail slot accepts 5/16" or 3/8" bolts, making it compatible with rail and most rail-less systems, including Snap N Rack, Unirac, IronRidge, and Eco Fasten. Installation is straightforward with the simple drill, seal, and mount process. Patent #8448407 ensures reliability and innovation.