High Quality Material: The solar panel brackets is using high-quality 304 stainless steel materials, high strength, corrosion resistance, UV resistance, so it 't be affected by hot, cold or humid weather. Easy to Install: The stainless steel hooks are pre-drilled holes in the surface, and the provided bolts and washers, you can use them to install the solar panel to the balcony railing quickly. and Sturdy: The corrosion-resistant solar panel holder is and compact, thin but very solid. which can support solar panels better, and have no burden on the railing. Wide Application: The solar panel mounting brackets is widely used on RV, marine, trailer, , boat, marine, flat roofs, ground, garages, motorhome, shed or other flat surfaces. Colour:Silver Material:Stainless steel Size:20cm Package Contents: 1 * Solar Panel Mounting Brackets 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.