Specification Brand : Matala BulletPoint1 : Excellent surface area per sq. ft. with good adhesion of nitrifying bacteria, measures 39" x 24" x 1.5" thick. BulletPoint2 : High free volume for smooth, even water flow throughout. BulletPoint3 : Very resistant to plugging & easy cleaning. BulletPoint4 : Mats are self-supporting, form-stable, rigid and non-brittle. BulletPoint5 : Lasts for many years- 6+ (2-5 times longer than ANY other mat on the market!) ExternallyAssignedProductIdentifier1 : 0719239690875 ExternallyAssignedProductIdentifier2 : 719239690875 ItemName : Matala Filter Media Black Filter Mat X-Lg Density Half Sheet 39" x 24" ItemPackageDimensions_Height : 4 inches ItemPackageDimensions_Length : 25 inches ItemPackageDimensions_Width : 24 inches ItemShape : Round ItemTypeKeyword : pond-filtration-equipment Manufacturer : Matala Material : Foam Material1 : PVC Material2 : Polyvinyl Chloride ModelNumber : WD0016C PartNumber : WD0016C ProductDescription : The open, highly aerobic 3 dimensional structure of Matala Filter Media promotes healthy water conditions and ease of cleaning in a wide variety of filter designs. This is simply the most effective, longest lasting, crush resistant filter material available today! You'll see it featured in every major Pond & Koi & Fish Care Magazine. It is a vast improvement over the OEM filter mats standard with most filters/skimmers today & a fantastic upgrade for any brand filter or skimmer! Easily trims to fit many different brand skimmers & filters. Size : With Check Valve Style : Modern UnspscCode : 52101500