I have used this seal on my CRF250 for several years and have been very happy with it. I have never found anything inside my airbox and don't have to deal with messy grease on the sealing lip of the air filter anymore. I recently bought this for my 2001 CR125 while rebuilding it and repairing the airbox.
This looked like the air filter I needed to replace. I was sent a gasket kit instead. Suppose that is on me. Retuned it by UPS, who promptly lost it. Never had to return anything before and did not write down tracking number. Ordered another which came with wrong center piece where bolt attaches. Dug the center piece from old one out of trash and was able to utilize. Will NEVER order from Dennis Kirk again.