Universal Air Cleaner Replacement Oder Eliminator Carbon Pre-filter Compatible with Coway AP1512HH 3 Pack Universal oder eliminator replacement carbon pre-filter designed for Coway AP1512HH Helps trap larger particles like dust, lint, fibers, pet fur Easy to install it without cutting any more Effective air pre-filter removes common household odors, including smoke cooking odors and pet odors, keeps the air in your home clean and fresh Depending on where it is and how heavy the use is, the pre-filter needs changing every 2-3 months