VEVA Advanced Filters Premium Carbon Activated Replacement Pre Filter 6 Pack Compatible with Air Purifier Models AC4800 Series (AC4825, AC4825e) and Filter B FLT4825 ENHANCE YOUR AIR PURIFIER - Capture more dust and particles than ever before with these specially made filters. Made thicker and more absorbent than the original pre-filter. INCREASE THE LIFE OF YOUR HEPA FILTER - Our pre-filters greatly reduce the amount of dust & particles getting into your main HEPA filter. Replacing your main HEPA filter is costly so with 6 pre-filters, you can save both time & money. MAKE YOUR HOME ODOR FREE - Made from Premium Quality Activated Carbon to help remove odor, smells and smoke. Ideal for pets, cooking, smokers & people suffering from asthma or allergies. FITS PERFECTLY - Compatible with Air Purifier Models AC4300BPTCA, AC4900CA, AC4825, AC4850PT, FLT4825 Filter B, AP2200CA and BXAP148. We include step-by-step instructions for quick and easy installation every time. Pre-Filter Dimensions: H: 15.75 x L: 4.72 x W 0.2