Birchwood Casey Swauber Applicators For Applying Gun Blue and Cleaner 20 Pk. This Birchwood Casey cleaning kit contains twenty of these applicators which allow you to daub on gun blue chemicals and cleaning chemicals evenly and safely. Birchwood Casey Swaubers are an essential tool for any gun maker or modifier's workbench. Specifications for Birchwood Casey Swauber Applicator: Quantity: 20 Bag: Poly Features of Birchwood Casey 20x Swauber Applicator: Evenly apply liquid cleaning and finishing chemicals to firearms Pack of 20 swaubers Package Contents: Birchwood Casey Swauber Applicators 41110 Birchwood Casey BC-41110 Swauber Applicators For Applying Gun Blue BC-41110