Shop Vac Complete Filter Kit- Compare with Shopvac Part# 9030400 Main Filter, 3008000 Retaining Ring, 9058500 Foam Prefilter Fits most wet/dry Shopvacs 5 gallons and above For dry or wet/dry pick-up Easy to Use Rust Free Plastic Kit Contains: 1 Filter- 1 Retainer Ring- 1 Foam Sleeve