1. I-Beam bracket is always clear anodized aluminium. Its length is sized to accommodate the rail width.
2. Z-Bracket is fabricated from 1/8" thick stainless bar stock. The bar stock width is selected to accommodate the rail width.
3. Tube bracket is always clear anodized aluminium. It is not available for hidden fastening.
4. Standard bracket fastening is to drill and countersink for flat head mechanical fasteners.
5. Hidden bracket fastener for aluminium rail is 3M VHB (Very High Bond) adhesive tape.