REPLACEMENT MODELS: Compatible with FC-2402, 303279, Free Flow, AquaTerra, Fantasy Hot Tub Filter. Note: All manufacturers' names and part numbers remain the property of their respective holder(s) and are used for compatibility information only. Wowreed is an independent brand. SPECIFICATIONS: Length: 9 1/2”; Outside Diameter: 5 3/8"; Top: Closed with String Handle; Bottom: 1 1/2" MPT Thread. EASY TO CLEAN: This filter utilizes fabric structure design so as to make the impurities easy to be released and washed. It is recommended to wash the filters every 2-6 weeks in order to maximize the performance and capacity of it. In addition, our premium filter material keeps your water clearer and easier to clean. LONG LIFE: The filters are with solid end caps, good material and bands, which can be used repeatedly. Longevity and endurance are ensured. SERVICE: If there is any question, please let us know! We promise a good shopping experience with our reliable control and testing. Spa Filter Compatible with FC-2402, 303279, Free Flow, AquaTerra, Fantasy Hot Tub Filter, 1 1/2" Finer Thread, 2 Pack