Features and Benefits:New and improved one-piece filter system is better at removing harmful VOC�s, protecting the environment and protecting workers Activated carbon block filter design captures more excess VOC�s than other filters Timestrip indicator eliminates the guesswork of filter changeouts (ideal operating temperature range 60‐80 degrees F); approximately 3 months of regular use Attaches to any standard 3/4" steel drum bung Replacement filter captures odors and VOC's released by punctured aerosol cans in your PIG Aerosol Can Recycler System.