Premium Material, Durable & Long Lasting: solar panel brackets are made of aluminum alloy, which with light weight, large load capacity and strong corrosion resistance, suitable for a variety of outdoor environments. which has the advantages of rust resistance. 30-45 mm Adjustable Solar End Clamp: This updated solar panel clamp features an innovative adjustable design with the addition of flexible clamp spacing adjustment. It can be universally used for solar modules with thickness of 1.18-1.77 inches(30-45 mm) Complete Kit:16 Pcs adjustable solar panel brackets kit, including complete accessories for installation, the quantity is enough to meet your daily use and replacement needs Easy Installation: solar mounting brackets have pre-drilled mounting holes on the surface and you just need to choose a slot to fit the height of your solar panel, and you can easily connect each solar panel. Easy to install, save time and labor cost Wide Applications: Suitable for most home, RV and marine solar panel installations, you can install solar panels on flat and pitched roofs made of tiles, asphalt shingles, ceramic tiles, slab shingles and standing seam boards. Provides toughness to withstand extreme weather conditions Colour:Silver Material:Aluminum Alloy Package Contents: 16 x brackets 2 x wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.