Solar Sun Rings Pool Cover | Plain Blue | SSRA-BL-02 Colorful spa light Does the locking knob need

Does the locking knob need any special tools to tighten it

effectively trapping debris and ensuring crystal-clear water for a refreshing swimming experience

indicating suitability for incidental food contact and adherence to safety standards

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Solar Sun Rings Pool Cover | Plain Blue | SSRA-BL-02 Colorful spa light Does the locking knob needThe Solar Sun Rings Pool Cover SSRA BL 02 with the Plain Blue Design is a passive solar heating device with anchors. made from two layers of UV resistant vinyl. The top clear layer focuses sunlight onto the blue layer, which absorbs around 50% of the sunlight and converts it into heat. These rings are 5 feet in diameter and are designed to float on the surface of the pool and connect to each other with the anchors, helping to retain heat at night