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.
Proline Jet Line Cleaner clears your hot tub jets of all unwanted organics, oils, residue, dirt, minerals and biofilm. It's a great way to keep your hot tub jets clean, clear, and working properly!