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.