No roof penetration - 100% waterproof Pre-assembling-easy and instant installation 6063 T5 aluminum -clamp is light-weight and attractive Q235B steel - clamp has high wind resistance Item NO:Fold tri-bracket sysColor:CustomizedPrice:0.5Min order:1ShippingPort:Guangzhou,ShenzhenOriginal Region:ChinaLead Time:15 daysSample:Not Available