Product review (1 stars): ... from the plastic frame far enough to make a good seal. Dryer lint gets around the screen and ...
Felt material around the edge does not stick out from the plastic frame far enough to make a good seal.  Dryer lint gets around the screen and goes up the vent tube and out onto the shingles via the roof vent. No improvement over my original filter screen that's over 10 years old.  Filter is totally useless. I sent a note to the seller and never got a reply.  Don't waste your money.