LifeSupplyUSA 10 in. x 48 in. x 1 in. Replacement Universal MERV 8 Carbon Pre-Filter Sheet Wrap for Honeywell and Many Others (2-Pack) 2ER692 - The Home Depot
STEELSOFT Extra Thick (3/8'') 16x50'' MERV 7 Cut To Size Activated Carbon Filter Charcoal Air Filter Sheet Material for Air Purifier/AC/Litter Box/Compost Bin/Range Hood, Carbon Filter Pad - Amazon.com
Amazon.com : Finest-Filters DIY Activated Carbon Impregnated Foam Sheet for Aquarium and Pond Filters (12mm Thick Sheet) : Pet Supplies
Activated Carbon Filter Media Pad Aquarium Pond Filter Media Canister Foam Sheet | eBay
Amazon.com: 16x48 Cut-to-Fit Activated Carbon Filter Sheet (1 Pack) Multi-Use Charcoal Air Filter Pad for Air Purifiers, Air Conditioners, Air Vents : Home & Kitchen