8 3/8" POOL LIGHT LENS GASKET AND STAINLESS PILOT SCREW - Keep pool water out of your pool lights with this high-quality and heavy-duty pool light gasket and stainless pilot screw. At 8 3/8 inches, this pool light gasket is a universal fit for niches made specifically for Pentair lights. The pilot screw is 1 5/16 inches long with threads that are specifically designed to fit on the screw holes on the Pentair pool light niche. No other type of screw will provide the same secure fit! WATERTIGHT SEAL FOR POOL LIGHT LENS - Made from silicone, this pool light lens gasket can withstand different pool chemical treatments and changes in water temperature. Whether you have a fresh water or salt water pool, this heavy-duty silicone gasket will protect your pool light housing from water leaks by creating a watertight seal around the lens cap. EXACT REPLACEMENT PENTAIR POOL LIGHT PARTS - These replacement pool light gasket and stainless pilot screw are manufactured to exact OEM standards and specifications serve as exact replacements for Pentair part number 79101600Z/O-170 79101600 pool light gasket and Pentair part number 79104800 stainless pilot screw. THE WHOLE KIT: Both replacement parts are perfect fit for Pentair (TM) lighting systems including Pentair IntelliBrite, Pentair Amerlite, and Pentair SAM Spectrum Amerlite lights. This gasket and screw set is also compatible with AmerQuartz, HiLite, SAL Spectrum Aqualight, SpaBrite, SunBrite II, and SunGlow II. IMPORTANT NOTE: This replacement kit is an aftermarket product produced by CalPalmy (TM). It meets or exceeds the performance of OEM replacements (based on in-house testing). We do not have any affiliation with or endorsement from any of the manufacturers mentioned.