ATTENTION: The shape of the end caps on both sides is different, Please ensure that the oval shaped end cap of the center hole faces downwards and engages the notch of the cartridge with the protrusion at the bottom of the central skeleton to prevent installation failure. SPECIFICATIONS: Length: 6 1/4"; Outer Dimension: 8"; Top: 3/3/8’‘ Circular ; Bottom Opening: 4 1/2" elliptical; Filtration Area: 30 Sq.ft; Filter Material: Trilobal Filtration Fabric. Please note: This filter has no slot, but it has a larger size opening at the bottom, which can fit the notch of spa mounting assembly well. This Item Does not fit hot tub before 2017 without Filter Cage Core Assembly, #10-00417. COMPATIBLE MODELS: PBF40M, PBF40, PBF40-M, Bull Frog Spas, Wellspring 30 Coreless 10-00282, SD-01389, 70361M, 8x6 Hot Tub Filters. ★NOTE: This is a compatible part. Original manufacturers' names and part numbers are for reference only. Yinage stands as an independent brand. SUPERIOR FILTRATION: Our innovative "Dirt-Locking" technology ensures that the fabric captures significantly more contaminants than standard filters. Efficiently remove hair, leaves, dust, sediment, sand, and more, ensuring a clean and refreshing spa and hot tub experience. EFFORTLESS CLEANING: The Trilobal Fabric Structure of the filter facilitates easy release of impurities during cleaning, ensuring the filter feels renewed after each wash. For optimal performance, it's recommended to clean the cartridges once a month. Filter: The Ideal Replacement for Pool & Spa Cleaning Systems.Compatible Part Numbers:PBF40M
PBF40-M
PBF40
Bull Frog 30
Wellspring 10-00282
Bullfrog 10-00282
SD-01389
70361M.Specifications of PLF-00282:Length: 6 1/4"Outside Diameter: 8"Top: Closed: 3/3/8’‘ Circular.Bottom: 4 1/2" elliptical.Filtration Area: 30 sq. ft.