This package contains two CF-1 Electrostatic primary filters to fit most Panasonic, Kenmore and Titan canister vacuums. Each filter pad measures 4 7/8" x 4 7/8" x 1/4", consisting of a 1/16" white electrostatic filter with a 3/16" grey foam backing. One fits vertically in the bag chamber behind the paper bag. Replace the foam premotor filter in the vacuum shown above with one of these electrostatic filters to provide even greater motor protection.