Swimline Super Deluxe 16' x 36' Rectangle In Ground Winter Pool Cover, 5' Overlap, Silver/Black | CO142141R C2613 Note: If water hardness level

Note: If water hardness level in existing pool water is above 400ppm (parts per million)

LED strip built into the unit

Length 9 1/4" Outer Diameter 4 15/16" Top Inner Diameter 2 1/8" Bottom Inner Diameter 2 1/8" Material 3 oz

Universal Compatibility: Works with chlorine

The open-centre Free Flow Core keeps operating pressure down by maximizing the surface area available for filtration

Swimline Super Deluxe 16' x 36' Rectangle In Ground Winter Pool Cover, 5' Overlap, Silver/Black | CO142141R C2613 Note: If water hardness levelSize: 16' x 36' Shape: Rectangle Color: Silver Black Pool Type: In Ground The Polarshield Pro Strength 16' x 36' Rectangle Pool Cover is made of extra strong polyethylene sheeting woven with thick polyethylene stitching, which provides superior strength and durability. The winter cover is treated to provide maximum resistance to damaging ultraviolet rays to inhibit deterioration and increase longevity. Adding a Pro Strength in ground winter pool cover