19mm wide opening - 1 Slot Vent Covers

60 Linear Slot Diffuser in a striking black finish for your HVAC needs This commercial grade one slot vent cover has a 19mm wide opening

AC system in rooms that could use a little extra help When shopping slot to hold it (I can't say the same for another tower fan

single coil in humbucker slot Linear Slot Diffuser

single slot gpu low profile Modern White AC Vent Covers - Ultra Modern Look - 100% Aluminum - No Corrosion