The filter for Beachcomber Spas is essential for maintaining clean, clear hot tub water. It operates from its own isolated reservoir in the hot tub, quietly removing impurities, keeping your water crystal clear and your pump protected 24/7 This 50 sq. ft. filter delivers twice the filtration capacity of the standard 25 sq. ft. model, giving you superior water quality with less maintenance. With regular rinsing and periodic soaking in 25 minute filter cleaner, a single filter can last for up to two years. For uninterrupted use, we recommend keeping two on hand, one in rotation and one ready to go. Details: Brand ProAqua, Made in New Zealand Part number PA-1450 Total medium: Fully flattened fibre fins totals 50 square feet Filter diameter : Width of round opening: 5 inches Filter height: 13 5/16 inches Filter top - bottom: open hole 2-1/8" Pleat material: 3 ounce fibre with a 212 pleat count Construction: Reinforced core with glued middle support band Approvals: NSF approved