Perfect Compatibility: KinClean hot tub filter cartridge, sized precisely at 4.13 x 3.15 inches, is compatible with Lay-Z-Spa & Coleman SaluSpa models (90352E, 58323, 90427E), and any inflatable hot tub requiring Type VI filters—no modification to your tub's filter housing is needed, eliminating installation guesswork, ensuring zero gaps or misalignment, and enabling instant, reliable filtration right out of the box. Superior Filtration: The type vi spa filter uses advanced trilobal fiber media, better than standard flat-fiber types. Its three-lobed structure makes filtration area 50% larger than regular PP filters, trapping more fine debris (pollen, dust, micro-organisms) without clogging. Thanks to its optimized fiber density, it maintains powerful filtration—even with repeated use. Low airflow resistance also helps the hot tub pump run smoothly—no extra strain, no drop in water circulation. Durable Thickened Filter: This saluspa hot tub filters are made with a thickened PP fiber membrane and reinforced end caps, so it resists wear from regular cleaning and hot water exposure. Unlike thinner filters that tear or deform easily, this one keeps its shape and structure for months, lasting longer than standard replacements. Even when you're tackling those stubborn bits of residue, it still holds up really well. That means you don't have to worry about breaking it while you clean. Safe Hot Tub Filter: This hot tub filter meets NSF/ANSI 50 aquatic equipment safety standards and is made with BPA-free PP materials. These materials are designed to keep harmful substances from leaching into the water during regular use, so the filtered water is safe for daily hot tub soaks. The filter also has an anti-chemical corrosion coating on its fibers, which helps keep the filter cleaner by reducing damage and buildup caused by corrosive chemicals. Simple Clean & Replace: The spa filters replacements for hot tub are designed for hassle-free use: it's simple to clean (just rinse with water) and reusable, cutting long-term costs while balancing convenience and value for regular hot tub owners. To maximize its effectiveness, we recommend cleaning weekly to remove surface debris and replacing monthly. These simple steps keep your hot tub water clean and ready to use. Hot Tub Type VI Filter Cartridge