Universal Adjustable Bimini Top Rear Support Poles - Designed to hold your bimini top securely in the folded position when not in use, compatible with most standard 3 bow and 4 bow bimini tops on the market. The adjustable length ranges from 95cm to 105cm to fit different boat configurations. Heavy Duty Aluminum Construction for Marine Use - Made of high-strength aluminum with a metallic finish, resistant to corrosion from saltwater, UV rays, and harsh outdoor marine environments. Outer tube measures 25mm diameter (1.5mm thick), inner tube measures 21.6mm diameter (1.3mm thick) for long-lasting durability. Quick Adjustment for Easy Storage & Deployment - The telescoping design lets you adjust the pole length in seconds to accommodate different bimini top folding positions, keeping your bimini secured out of the way when stored to save deck space. No special tools are required for installation or adjustment. Compatible With Most Boat Bimini Configurations - Ideal for fishing boats, pontoons, ski boats, and all other marine vessels with standard 3 or 4 bow bimini tops. The universal mounting design works with all major bimini top brands for easy replacement or upgrade.