TACO ShadeFin Rail MountThese mounts are constructed from aluminum grade alloy with stainless steel hardware for long lasting durability. Suitable for both vertical and horizontal applications. T10-4000-15 Round Rail Mount fits 7/8" - 1" OD Tubes; T10-4000-9 Square Rail Mount fits 1" - 1-1/2" OD Tubes; Product Features: Mounting Hardware Included; Aluminum Grade Alloy; Stainless Steel Screws; Click here for Round Tube Mount Installation InstructionsClick here for Square Tube Mount Installation Instructions