Features: Dual Density - The White Sideas Open Fiber Construction Traps Larger Particles While The Green Sideas Dense Fiber Network Traps Fine Particles - Working Together To Produce Crystal Clear Water In Your Aquarium Cut To Fit - Can Easily Be Cut To Any Size And Used As A Pre-Filter For Any Aquarium Filter, Sump, Wetdry, Canister, Power Filter Etc Improve Water Quality - Provide Mechanical Filtration To Keep Your Water Clear For Extended Period Of Time Good For Both Freshwater And Saltwater Tank Dimension: 72A X12A X 34-1A (Thickness Measured Dry Before Packing And Varies By Batch) Dimension: 72A X12A X 34-1A Includes: (1) Filter Pad