Then, the smal tube is insrted into the big one, and the gap is carfully filled with activated carbon granuals.

Once this is done, a second strip of foam is inserted around the top, this helps the filter keep its shape.

this is then all sealed up with duct tape
babystarbud Reviewed by babystarbud on . Home made carbon filter A variation of the one in the FAQ;s This is a large filter suitable for 6-8 inch ducting. Ingredients: wire mesh tie clips large Rating: 5