The Pontoon Boat Canvas Solution is designed to fit 1-1/4″ square fencing with solid aluminum Arch-Makers, not cheap tubing that will bend and break. Easy to apply and remove when not in use. Combined with 3/4″ Schedule 40 PVC that interconnects with the 5-way PVC connectors, you have a floor-supported dome that supports and holds your canvas cover better than anything else on the market today. Slide on, NO nuts & bolts, screws, or glue.