GLI Secur-A-Pool 16 FT X 36 FT Rectangular Mesh Safety Cover System with 4 FT X 8 FT Center End Step, Blue GLI Secur-A-Pool Actual Cover Size 18-Feet by 38-Feet Rectangular Mesh Safety Cover System with 4-Feet by 10-Feet Center End Step, Blue 50-Percent more puncture resistant; improved resistance to damage and puncturing from falling tree branches, deer hooves and stray animals PVC coated polyester fabric is 30-Percent lighter than standard solid covers 100-Percent sunlight blockage; no springtime algae growth Comes with pump in lieu of drain