Is this convex bend in my furnace filter slot OK?

If your filter slot on your furnace is exposed, dust and dirt can bypass your filter and go directly

Air Filter Efficiently seal air leakage and by-pass at your filter slotdoor with our Air Filter SlotDoor Cover Designed to force dirty air to travel

airplane slot machine AllergyZone - FilterLock Filter Slot Seal – Seal Cover for Any 1” Furnace Filter, Up To 25” Long 92 reviews $ $

air master slot diffuser catalogue The Filter Slot Seal is ideal for any furnace, air conditioner or air cleaner filter Based on recommendations by the Department of Energy, you should cover