This is a replacement filter that fits the carbon composite cannister of the FMIND12 FMIND010 FMIND05 FMINDF500 These are priced individually. Please order 2 when replacing filters on the Twintake system. All Forge Motorsport products come with a limited lifetime warranty. All warranty claims must be accompanied by the original proof of purchase to enable us to help you. Failure to supply this proof will result in your claim or enquiry being denied.