Seal Cover for Any 1” Furnace Filter, Up To 25” Long

metal in the pool , a small opening being made and closed by mica or glass furnace as occasion may require without uncovering the opening The

: FilterLock seals one inch furnace and AC filter slots to improve indoor air quality and reduce utility bills Cover for furnace filter Cover for filter slot

metalen kast met slot Two-piece design works with any 1” furnace filter up to 25” long Additional Features: Reusable, easy on easy off design for long-term use Seal measures

metal slot drain It should fit snug Good video on how to convert to 4 or 5 inch meds filter Also to check static