Genuine factory Original Filter Upgrade kit- to fit Aprilaire and SpaceGard Model 2400/2140 Air Cleaners This Upgrade kit will improve the efficiency of your air cleaner, the Upgrade kit uses a Merv 13 air filter (Model No. 413) a 65% improvement, can also use a MERV 10 Filter (Model No. 410) * The kit includes 1 Merv 13 filter. * The metal frame base and supports simply snap together- no tools required. * Space pleater combs no longer required
