Length 13 5/16″ inside diameter 2 1/8″ outside diameter 5. The item “6 Pleatco Antimicrobial Filters fit C4950, C-4950, FC2390, PRB50-IN, PRB50-IN-M” is in sale since Friday, December 16, 2011. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Spas & Hot Tubs”. The seller is “thepoolman” and is located in lower 48 state shipping only. This item can be shipped to United States.