Our selection of pipe screens are made of fine woven brass mesh that effectively allows free flow of smoke and air while keeping dirty, harmful ash from pulling through your pipe. Pipe screens prevent clogging and stop hot ash and embers from entering the inner pipe, making smoking more enjoyable and cleaning a much easier task. Pipe screens are durable so they can be cleaned and reused or can be replaced as needed to support maximum air and smoke flow. Designed exclusively by GRIMM Co. GRIMM Co. has two distribution buildings located in Michigan. GRIMM Co. has been selling online since 2011. GRIMM Co started selling locally at farmers markets, music events and local trade markets. Now since doubling their team, they are traveling the US to share their quality goods with the world. These filters come with a 1 Year Limited Manufacturers Warranty provided by GRIMM Co. which is upheld by North America Traders. For more information, please contact North America Traders. GRIMM Co. pipe filters are manufactured, distributed and sold only by North America Traders. Any other sellers are selling counterfeit goods. North America Traders own all copyright and trademarks in this listing.