Vevor Swimming Pool Safety Cover Inground 18x42ft, Rectangle Safety Pool Cover Good-Sized Pool Cover High-Quality Polypropylene Strengthened Construction Easy To Assemble Good Rain Permeability Tight Mesh Design Ground Bolt: Brass,Tension Spring: 304 stainless steel,Swimming Pool Size: 16 x 40 ft/4.9 x 12.2 m,Color: Green,Model: SSPC-7440,Swimming Pool Cover Size: 18 x 42 ft/5.5 x 12.8 m,Material: Polypropylene,Surface: Tight Mesh