Specification Brand : Thunder Parts BulletPoint1 : Ideal for the installation of plumbing and filtration systems in ponds, water features and gardens BulletPoint2 : Signature Skimmer Bulkhead Check Valve Adapter BulletPoint3 : CONSTRUCTED OF RUGGED PVC for durability and long life BulletPoint4 : Features 2 inch female NPT threads BulletPoint5 : This slotted pump filter screen is 3 inches in diameter x 22-1/2 inches in length (3" x 22.5") Color : Black ExternallyAssignedProductIdentifier : 4993833142084 ExternallyAssignedProductIdentifier1 : 827807295114 ExternallyAssignedProductIdentifier2 : 0827807295114 GpsrSafetyAttestation : 1 IncludedComponents : Lake Screen Filter, Filter Sock ItemDisplayWeight : 0.1 pounds ItemName : Thunder Parts Original Matala MDB11-12 | 12 inch Diffuser & Weighted Base | Aeration for Ponds, Lakes, Koi Ponds and big Aquariums | Fill with sand or rocks (1 x 12 Diffuser) ItemPackageDimensions_Height : 34.29 centimeters ItemPackageDimensions_Length : 16.1036 centimeters ItemPackageDimensions_Width : 33.0962 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : pond-filtration-equipment Manufacturer : Thunder Parts Material : Sand ModelName : Signature Series Skimmer ModelNumber : MDB11-12 NumberOfBoxes : 1 NumberOfItems : 2 PackageLevel : unit PartNumber : MDB11-12 PowerSourceType : Does Not Apply ProductDescription : Matala MDB11-12 | Empty base with 12” diffusers | Requires 1- 4 cfm (25 -120 lpm) to operate properly | Hollow inside to fill with rocks, sand or gravel Includes 4 section. The air diffuser platform allows you to mount air diffuser(s) firmly at the bottom of the pond and keeps the air diffusers up out of the mud. The air diffuser platform is designed with a hollow base that can be filled with sand or gravel. Choice the number of disc diffusers for your installation needs. The Matala EPDM disc diffusers are designed for industry heavy duty installation. Precision perforated I-shaped slits open when airflow is present and close when airflow is stopped, which increase the slits resist from tearing, and stay cleaner longer. These diffusers offer the lowest back pressure in the market, only adds less than 6 inches of water depth back pressure, allowing you to utilize your air pump in the most efficient way. All different model types comes with a single 3/4-inch PT female threaded outlet connection. A Quick uni-pack available to easily connect 2 air diffuser platforms together with only one 3/4-inch PT threaded outlet connector; double the aeration performance without extra air pump or air tubing! Used for: increasing dissolved oxygen, improving water quality, water circulation, dock & boat slip deicing, wastewater treatment plants WWTP, solids floatation, water gardens and various other applications. Life by Air supplies aeration kits and filtration equipment for Ponds, Lakes, Aquariums, Canals, Commercial Fish Farms, Koi Fish Tanks, Aquaculture, Shrimp Farms, Pool Ponds and more. Our products include all types of blowers and pumps, weighted air diffusers, aeration and weighted hoses, complete aeration kits and much more. In aquatic environments like fish ponds, aquariums, lakes or aquaculture projects, oxygen is the single most limiting factor for success | Aeration keeps plants and animals in the water alive | Contact Life by Air for more information.