This is a genuine Bissell replacement Filter Cartridge for all Bissell 3-in-1 Lightweight Stick Vac 38B1 series models The filter may be washed several times but should be replaced once every 6 months This filter is located inside of the dust cup and captures microscopic dust and debris If your vacuum suddenly looses suction power replacing this filter should be the first step in diagnosing the suction loss Fits all Bissell 3 in 1 Lightweight Stick Vacuum Models in the 38B1 series including 38B1 Silver 38B1-1 Chrome 38B1-3 Fearless Red 38B1-4 38B1-5 Lime Popsicle 38B1-6 38B1-7 Blue 38B1-8