4 x 12 Inch Air Vent Filter for Home Ceiling Thin, ULTRA GREEN Floor Filters Replacement for Register Work in Indoor Home Air Purifier, Air Conditioner 4" x 12" 12-Pack (White)

["𝐀𝐈𝐑 𝐕𝐄𝐍𝐓 𝐅𝐈𝐋𝐓𝐄𝐑𝐒 𝐅𝐎𝐑 𝐀𝐂 𝐔𝐍𝐈𝐓𝐒 𝐀𝐍𝐃 𝐇𝐄𝐀𝐓𝐄𝐑𝐒: Insert these air vent filters 4x12 Inch into the floor air vent registers to purify the air coming from your AC units and heaters. Designed to filter the air you breathe; these air vent filters also prevent dirt and other objects from falling into the air vents","𝐃𝐈𝐌𝐄𝐍𝐒𝐈𝐎𝐍 & 𝐓𝐇𝐈𝐂𝐊𝐄𝐍𝐃𝐄𝐃 𝐃𝐄𝐒𝐈𝐆𝐇: 4x12 Inch, Easily trimmed with scissors to the size you need. Our newest carbon register filter has been thickened and its density has been increased by approximately two times","𝐏𝐀𝐂𝐊𝐀𝐆𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓𝐒: 12 Pack of 4\"x12\" Thin Air Vent Filters (White)","𝐂𝐎𝐌𝐏𝐋𝐄𝐓𝐄 𝐑𝐄𝐏𝐋𝐀𝐂𝐄𝐌𝐄𝐍𝐓: Our pre-filters greatly reduce the amount of dust & particles getting into your main HEPA filter. This saves you time cleaning and vacuuming the main filter. It is suggested to replace every 90 days","𝐖𝐀𝐑𝐌 𝐓𝐈𝐏𝐒: Do not use filter in every register in home. This might cause restrictionin your airflow and damage your AC/Furnace unit"]