Description:Katadyn Vario Replacement Camping Filters: This is the pleated filter portion of the Katadyn Vario Camping Filter System. There are 2 other parts to the Katadyn Vario Replacement Camping Filter. The 2 parts are the carbon filter pack and the ceramic disc. All three filter elements (ceramic, carbon, and pleated) can be replaced individually. The ceramic prefilter is cleanable. The pleated glass fiber filter last 530 gallons or 2,000 liters. The carbon lasts for 106 gallons or 400 liters. These estimates also depend on the quality of the water.Technical Information: Filter Type: Granular Activated Carbon Micron Rating: 0.3 microns Size: 4 1/2 inches (length) x 2 1/4 inches (diameter)