Classic Oval Solid Winter Aboveground Pool Cover 18 x 40 Feet length_30 Feet 90 inch rails is oblong

90 inch rails is oblong or keyhole in shape and made from stainless steel

It will activate in approximately 2-1/2 inches of water and deactivate when the water level reaches approximately 1 inch

DPD 1A and DPD 1B are added to a 5 or 10 mL sample to test Free Available Chlorine

but includes 1/4-20 UNC ground screw

Classic Oval Solid Winter Aboveground Pool Cover 18 x 40 Feet length_30 Feet 90 inch rails is oblongThis solid pool winter cover is designed to fit an oval pool with an overall size of 18 x 40 feet. These covers are designed to be larger than the pool itself to allow for sagging and overlap needed to install water bags. The overall cover size is 21 x 43 feet. GLI Solid Winter Covers are made from tough polyethylene fabric which is one of the most durable cover materials available. These covers have a double folded and double stitched edge with