This corncob pipe filter is a type of paper-based filter, which is made of absorbent paper that is rolled-up , and forms a hollow tube. These Filters allow for a dry smoke experience and absorb condensate very well for a neutral taste. Our corncob pipe filters measure 34.8mm long, 5.5mm diameter, take out the corncob pipe for installation demo it fits in each 6 mm tenon.There is a unique system that uses a baffle screen interior to break up smoke passing over them.Perfect for Corn Cob Pipe