2000 psi tensile strength Marine Grade PVC inflatable buoy Easy inflation with ball needle or air compressor. (not included) Extra large line holes fits most ropes and shackles Salty Reef marine accessories are guaranteed to provide you with the highest quality and durability for both fresh and saltwater marine activities. Protect your boat with the highest grade PVC Vinyl available on the market today. Salty Reef Round Boat Fender and Marker Buoy Perfect boat fenders for commercial fishermen and pleasure boaters around the world in the most adverse conditions. The reinforced rope greater strength and durability for any marine conditions 12 inch round UV protected PVC.