AIR TRAPPED INSIDE THESE PROFILES, CUSHIONS IMPACT JUST LIKE A PRESSURIZED FENDER, BUT MOUNT PERMANENTLY, EXACTLY WHERE NEEDED, FOR FULL TIME PROTECTION. These Profiles are constructed of marine grade flexible PVC, developed not to chip or crack under normal usage. Unaffected by oil, gas or salt water. UV Inhibitors and Fungicides prevent fading, yellowing, deterioration from sunlight and unsightly blotching. Protect your investment with a durable "fender soft" Protection System. Easily installed on any horizontal or vertical surface. Large Air Cushion sections with large air volume provide excellent protection. Use Corners, End Plugs and Connectors. Corners, End Plugs, Connectors and Stainless Steel Screws, sold separately. Use DockEdge PVC Solvent Cement 05-F for strong, secure bonding of Air Cushion Connections.