ENERGY-EFFICIENT This bracket with tilting design which can gain up to 25% more sunlight than laying them flat, sunlight reaches the earth at a different angle in different seasons, adjust the angle of your solar panel accordingly it the most efficient way to generate more power. DURABLE MATERIAL Durable Rust-Resistant aluminum alloy frame stands against different weather elements,light weight and sturdy for portable and outdoor long term use UNIVERSAL SIZE The 28in x 28in x 14-1/2in mounting bracket is compatible with most solar panels up to 200W on the market, mount it as you like, landscape style or portrait style ADJUSTABLE ANGLE Angle adjustable from 0 to 80 degree, receive more sunlight, adjust angle to collect more sunlight IN THE BOX（hardware includes） Rails x 4pcs , Tilt Legs x 2pcs Aluminum Mounting Rails (22’’) x 4Aluminum Tilt Angle Bracket (11-27/64’’) x 2Steel Knob Bolt (plastic handle) x 4Steel Wing Nut x 4Steel Flange Nut x 4,Steel Module Bolt x 4Steel Flat Washer x 4,Steel Spring Washer x 4Steel Self-tapping Screw x 4Plastic Washer x 4 INSTALLATION : 1- Adjust the support legs as perfect angle for your solar panel; 2- Fasten the rails to the legs with the includes bolts; 3- Securely fasten the mounting feet to the desired surface. CAUTION: 1-Pls wear gloves when installing to protect your hands; 2-Based on the mounting holes on our brackets, pls kindly adjust your solar panels to meet the hole during installation.