Specification Brand : Pentair BulletPoint1 : O-ring replacement BulletPoint2 : Fits Sta-Rite Posi-Flo II pool and spa cartridge filters model PTM50, PTM70, PTM100 and compatible with PTM135 Series BulletPoint3 : Also fits Sta-Rite pool and spa filters separation tank assembly BulletPoint4 : Available in black color BulletPoint5 : 【Best Quality-Cost Effective】We Provide 6 Money Back service due to product quality problems and 7-24H after selling service will be provided.Please contact us for free if you have any problems. BulletPoint6 : 【Durable & Cost-Effective】Featuring a unique Trilobal Filtration Fabric Structure, our filter excels in capturing a large volume of contaminants. It's also designed for easy cleaning and maintenance. With proper care, expect a service life of 1-2 years. We're dedicated to offering top-notch quality at an affordable price. Color : Black CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier1 : 788379853167 ExternallyAssignedProductIdentifier2 : 0788379853167 GpsrSafetyAttestation : 1 ItemDisplayDimensions_Length : 11 inches ItemName : Pentair WC9-3 Black O-Ring Replacement for Select Sta-Rite Pool and Spa Cartridge Filters ItemPackageDimensions_Height : 4.064 centimeters ItemPackageDimensions_Length : 30.48 centimeters ItemPackageDimensions_Width : 15.494 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : swimming-pool-cartridge-filters Manufacturer : Pentair - Distribution Material : Metal ModelName : P-PJAN115 ModelNumber : WC9-3 NumberOfBoxes : 5 NumberOfItems : 1 PackageLevel : unit PartNumber : WC9-3 PowerSourceType : manual ProductDescription : Package Content:4 Filters Size : Long Thread Version (10-2780) SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 31400000