Spa Filters for Hot Tub, Pww50 Filter for Compatible for Spa Hot Tub Filter, Replacemen for Compatible with for Unicel 6CH-940, for Filbur FC-0359, for Waterway Plastics 817-0050 (2pcs)hot tub filter High QualityJEFFEL Replacement pww50 Hot Tub Filter & Spa Filters Cartridges are manufactured with certified safe materials. The whole filter includes the break resistant handle, big flow ABS inner core and thick filtration fabric to form a strong and durable body. The filter can resist high pressure and the corrosion of high capacity chlorine. If properly maintained, this filter can be used for 1 2 years. pww50 hot tub filterhot tub