velnor 210 filter replacement for aprilaire us patented naturally bamboo kun | perfect for pet home, natural bamboo freshness, moisture protection, advanced odor control,20x25x4, merv 11 210 [1 pack ] is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 98% below the $49.27 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.