Happy Hot Tubs 4-Pack Tri-X Replacement Filters for Hotspring Hot Spring PWK30 - Compatible with Hot Tubs, Spas, and Jacuzzis for Clean Water Maintenance

4 x Tri-X Filters This Filter Is a High Quality Replacement and Revolutionizes Spa Filtering And Maintenance. This Offical Watkins HotSpring Filter Can replace the standard PWK30. The Watkins Tri-X filter is 3-dimensional to more effectively filtrate by depth and surface, creating a longer time between cleaning cycles. Each ceramic fiber Tri-X filter provides 65 square feet of filtration. Fits All HotSpring Highlife Spas. The unique design enables it to filter twice the water per minute than a common filter. You don?t have to clean it as often either! Dishwasher safe! No soap. No drying cycle, These Filters Really Make Maintaining a Hot Tub Alot Easier. (No more spraying off your filters outside in the dead of Winter!). Spa make/models that this filter fits... Hot Spring - Fits Every HotSpring Hot Tub Hotspot Round (Year 1998+) Hotspot Square (Year 1998+) Measurements : Top Diameter : 6'' (152mm) Length : 10 1/2'' (267mm) Top Hole : 2 1/16'' (66mm) Bottom Hole: 2 1/1