Think Crucial Replacement Unicel C-8412 Pool Filter, Fits 120 Square Foot Hayward CX1200RE, 23-5/6" x 8-5/16" in. EXTREMELY DURABLE so when you insert your filter into your pool, it doesn't break or cause you to purchase anything extra besides changing your filter every 12-24 months. HEALTHIER LIVING because you're keeping your pool water the cleanest it can possibly be. No one wants to swim in a dirty pool! Plus, this filter is comparable to Unicel Part No. C-8412, Hayward Part No. CX1200RE, Waterway Part Nos. Pro Clean 125 & Clearwater II 125. PREMIUM FILTRATION when you swim in your pool. These filters can filter out bacteria, unwanted contaminants, unpleasant odors and more! INCREDIBLY SIMPLE TO USE because there is basically only one step! Take out your old pool filter and insert your new filter. Done! GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!