GLI Secur-A-Pool 20 FT X 39 FT Grecian Mesh Safety Cover System with 4 FT X 8 FT Left Offset Step, Green GLI Secur-A-Pool Actual Cover Size 23-Feet by 42-Feet Grecian Mesh Safety Cover System with 4-Feet by 10-Feet Left Offset Step, Green Mesh construction filters water and snow through, screens out leaves and other debris Made from tough UV inhibited polypropylene fabric Stainless steel and brass hardware, wont rust or corrode Prevents accidental intrusion by children and pets