FILTER CARTRIDGE KIT: Set of 4 filter cartridges bundled with 2 Sewanta oil absorbing sponges, By Absorbing oil & Lotion it will save the life of the filter. for best results let two flowers float on the surface of the water. TYPE A’ OR C’ FILTER: 2 different sizes on either side of the filter; Choose the side that matches your pump model – simple installation & replacement. It is designed for use with Intex filter pump Model # 603&604/G – 635T&636T/G – 637R&638R/G – CS7111 & CS7221/7231 – EC07111 & EC07221 & 7231. EASY MAINTENANCE: Helps Pool to get rid of build-up and debris by collecting pool gunk! Removes particles, chemicals, and metals such as copper and lead – reduces substances that make pool water too strong like chlorine and its compounds, sunscreen, deodorants, and hair-care products DURABLE MATERIAL: Made from Dacron material (polypropylene & Dacron plastic fiber) – heavy duty paper with pleats for better filtration – Filter up to 1,500 gallon per hour – life is about 2,000 hours. for best results change filter every 2 weeks for healthy water and a sparkling clean pool. REPLACE OR CLEAN: Replace filter cartridge with a new one every two weeks for best results – Easy to clean when necessary, Scrub with a Cartridge Cleaner Tool, then wash under a strong water pressure to remove loose particles from the filter’s fabric.