For use in straining paint before spraying. Straining paint before spraying will help to eliminate plugging of gun filters and help to eliminate foreign objects being drawn into the pump. These strainers are highly recommended for use in outdoor environments where gusts of wind may blow debris into your paint container. Available in two sizes, 1 gallon and 5 gallon. Fine mesh strainer has elastic top to hold bag in place. The 1 gallon strainer is specially made to fit Lemmer hopper type machines, the 5 gallon fits 5 gallon pails.