Our type VI hot tub filter is featured with upgraded trilobal fabric they are air permeability water permeability and penetrating property allowing water through while stopping debris. This is the reason why they are stable reliable and strong. Cheap but awesome! 【Perfect Replacement】 Type VI spa filter works for Coleman SaluSpa Lay-Z-Spa Bestway Intex and other inflatable hot tub filters. 【Dimension】 Outside Ring Dia: 4-3/16 Inside Ring Dia: 2 Height: 3-1/8 . Exact the same size as your old one. (no built-in chlorinator) 【Solid Structure】 Enclosed thick pleated fabric combined with a strong plastic internal support frame holds shape and is not easily deformed when pool water flows through. 【Efficient Filtration】 The ultra-fine sturdy global filter paper grabs sand sediment and hair and leaves more than regular fabric. Allowing for greater capacity and debris reduction. 【Last Long】 They are durable easy to clean with a garden hose and reused several times greatly extending the life of the filter. Save your budget.