Features: 1.The product is made of high-quality wood raw materials, non-toxic, odorless and safe to use. 2.The unique structure of wood filter can effectively reduce tar and moisture produced by tobacco and protect health. 3.Use and replacement are very simple, just take the pipe apart and put the wooden filter core in. 4.Wood filter core has a fluffy structure with many tiny holes which can absorb tar. 5.The size is 6mm, suitable for most pipe use. specification:Feature: The product is made of high-quality wood raw materials, non-toxic, odorless and safe to use. The unique structure of wood filter can effectively reduce tar and moisture produced by tobacco and protect health. Use and replacement are very simple, just take the pipe apart and put the wooden filter core in. Wood filter core has a fluffy structure with many tiny holes which can absorb tar. The size is 6mm, suitable for most pipe use. : Material: Wood Size: 6mm Package list: 1 * Balsa Filters(Bag) Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.