【NSF/ANSI 50 CERTIFIED】PURIFIED Pool and Spa filter is tested and certified by IAPMO against NSF/ANSI 50. The filter with certified safe materials provides you with clean, fresh and clear water. Only select certified filters for your family to ensure the safety, health and happiness of your loved ones..【REPLACEMENT MODELS】filter compatible PRB50-IN, Unicel C-4950, Aladdin 15002, 03FIL1600,817-5000, 435-0037, R173434, 06-0012-12, SD-00201, PLE-051-0088, 6540-471, Jacuzzi J210/J220/J235/J245/J275 Hot Tub Filter. Length: 13 5/16”; Outside Diameter: 5”; Top Hole: 2 1/8” Open; Bottom Hole: 2 1/8” Open. NOTE: This is a compatible spare part and the manufacturers' names and part numbers have been used for reference purposes only. PURIFIED is an independent brand..【EASY TO CLEAN】Uniformity and high-performance trilobal fabric make it easier to capture and release stains, so it's easy for you to wash the filter after use. It is recommended that you clean the cartridges every month dependon usage to maximize your pool's performance..【Powerful Filtration Performance】 Unique HEYU filter cloth with advanced Y-type wire make the fabric traps much more contaminants than regular fabric. This filter efficiently removes hair, leaves, dust, sediment, sand, etc. Enjoy clean leisure time in your spa and hot tub..【6-MONTH RETURN POLICY GUARANTEED!】Product Life Time Warranty on Every Filter Confirmed with Defects in Material, Workmanship, and Any Filter Caused Malfunction within Each Filter's 12-Month Service Life. We promise a risk-free shopping experience backed up with our reliable customer service and technical support team which is located to Los Angeles.