Pre-Filter A Fit Model: for 50000 series, 17000 series, 18150 series, 40100 series, 40200 series & HPA100,200,300 series consoles. Replace parts # 38002 (Does not fit towers). Maintain Cleaner and Healthier Home Environment: carbon filter deodorize the air and trap larger particles, provide better quality air you breathe. Size of for Carbon filter A: 47inch x 15.5inch. Each filter can be cut to make 1-8 pre-filters depending on model. Can be cut to fit, range hoods and furnace filters. Recommendation: change the for pre-filters regularly as needed,usually replace every 2 or 3 months. Shipping List: 4 Packs HRF- Pre Filters ( can make 1-8 pre-filters depending on the model.) and 2pcs Free cleaning brush (can clean your device) Colour:Black Material:cotton Package Contents: 4 x Carbon Pre Filters 2 x clean brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.