With Scumball, you can remove all those body oils, suntan lotions, and oily scented products that form a scum line on the surface of your pool or spa. These scum-beating balls can absorb up to 40 times their own weight with all those oils and lotions!
Thumbscrew 1/4 - 20 x 1.75 inch. These are used to secure your corner skirting pieces on your spa in place. This part is the longer of the two thumb-screws available.