【Type I Pool Filter Cartridge】 Type I replacement filter cartridge is a part of your routine maintenance for your swimming pool or hot tub cleaning. Inner diameter：1.1inches.Outer diameter: 3.11 inches; Total height: 3.46 inches.Suitable for Filter Pump or fits some pumps with Type I filters.Compatible with 300/330 gal/h (220-240 V) filter pumps 【Powerful Filtration Performance】This massage pool filter element could make sure the water clean and fresh. Helps Pool to get rid of build-up and debris by collecting pool gunk!This spa filter cartridge efficiently removes hair, leaves, dust, sediment, sand, etc. Strong Filtration of the filter cartridge could make you enjoy the safe leisure time with your family and friends. 【Easy to clean】The pool spa filter is made of heavy duty Dacron fabric paper, easy to clean.Scrub with a Cartridge Cleaner Tool, then wash under a strong water pressure to remove loose particles from the filter's fabric.It is better for maximum efficiency if you could