Get money back with the current Rebates since this one has ended. Receive a $6 rebate by mail when you buy 3 individual Filtrete Air Filters with a Microparticle Performance Rating (MPR) of 1000 or greater. A multi pack will be considered a single unit. Purchases must be made between 1/1/13 and 6/30/13. Rebates must be received by 7/31/13. Please allow 8-10 weeks for rebate delivery. Limit 1 request per household. Valid only in United States. Thanks to Northern Cheapskate for sharing!