This hot tub filter is from the new range by FilterLogic, offering an economical and energy efficient alternative filter for your hot tub / spa. Well maintained filtration in hot tubs is essential to ensure suspended dirt and debris doesn’t cause damage to the integral pump and heating system. The filter can also help prevent the build up of sludge in the pipework that could lead to microbiological contamination. Each filter also removes impurities such as precipitated iron, calcium, body oils, lotions and dirt. The filter will last for up to 6 months and it is recommended that you rotate filter sets every two weeks. The FilterLogic SFL75-5-20OBE is compatible with a large number of filters from different manufacturers, this is why you should always compare the dimensions of your filter against the dimensions listed.  Compatible with the following filters / systems: - Pleatco: PRB75IN / PRB75 / PRB75-IN / PRB-75IN / PRB-75 - Darlly: 40751 - Filbur: FC-2395, FC2395 - Unicel: C-4975 Dimensions: Length - 508mm Outer Diameter - 127mm Inner Diameter - 51mm End Cap Fitting: OBE (Open Both Ends) This filter will fit spas and hot tubs from the the following manufacturers, please check dimensions prior to purchase: - Beachcomber - Hydropool - Dakota Spas - Maax Spas - Emerald Spas