ProTeam 103227 Intercept Micro Filter to Fit Sierra (10 Pack) Four Level Filtration - ProTeam's Four Level Filtration system provides advanced protection against there introduction of pollutants back into an environment Larger Capacity - ProTeam's Intercept Micro Filters have 21% more filtration area than non-pleated filters Longer Filter Life - Fully laminated inner liner eliminates shredding Improved Air Quality - Dual layered construction captures fine particles, improving Indoor Air Quality. Intercept microbial treatment helps contain odors and prevent the growth of mold and bacteria Fits - Sierra This is a ProTeam replacement part Part Number 103227 This is an O.E.M. part