Mighty Mesh Grecian Safety Pool Cover 18 x 37 Feet, 4 x 8 Feet Center End Step Rayner 140-MM18X37GRECIANCE 140-MM18X37GRECIANCE Mighty Mesh safety material covers provide the benefits of both mesh and vinyl covers. These covers are lightweight like mesh and as sturdy as vinyl covers, allowing water to drain through while keeping debris and sunlight out. With a bursting strength of 670 pounds per square inch, it is strong enough to support adults or large animals walking on it.All Rayner pool covers are individually made using only the best materials. And to provide extra strength and reduce premature wearing, they are fully reinforced (both the top and bottom) with polypropylene nylon webbing. The cover is secured to the deck and held taut on the pool with rust-proof brass anchors and stainless steel springs. The straps have superior D-ring adjustment connections and ends that do not fray!The Mighty Mesh cover is absolutely maintenance free! Since the mesh allows water to drain through, there is no water to pump off the cover. And without the potential hazard of standing or puddled water, you can simply put on your safety mesh cover and forget about it until spring. All Rayner safety mesh and solid vinyl covers are certified to meet or exceed ASTM F1346-91 specifications. Rayner covers come with a limited lifetime warranty.This cover includes: rubber abrasion strips at each strap, vinyl wear-pad for the protection of inside corners, stainless steel springs with vinyl spring covers, stainless steel D-rings, brass concrete anchors (threaded and slotted), Allen wrench, tamper tool, store bag, heavy-duty installation rod, and installation instructions.