Aboveground Wide Mouth Hercules Rapid Flo Winter Skimmer Plug - 5-3/8 x 15-3/16 Inches pool-shape_Oval It is used for alkalinity

It is used for alkalinity test with Taylor Kits

a one foot extension on the back rail

5 Foot Pool with 4 x 8 Center Step

Max per California Code is 127

This Pool Closed With Sunset Graphic aluminum sign measures 12 x 06 inches

Aboveground Wide Mouth Hercules Rapid Flo Winter Skimmer Plug - 5-3/8 x 15-3/16 Inches pool-shape_Oval It is used for alkalinityThe Hercules Rapid Flo Aboveground Winter Skimmer Plug securely fits into your skimmer opening using an exclusive Rovaseal thermo insulated layer, ensuring a water tight seal. Just press the Skimmer Plug flush all the way in against your existing skimmer faceplate. No tools are required and you don't need to drain your pool! Made of ABS plastic, the durable outer plate creates a 100% air tight seal preventing freezing during the winter months. This