Soundproofing Custom Cut Width Door Sweep (37" to 48") Soundproofing Custom Cut Door Sweep for Doors 37" to 48" Wide. Great for Noise Reduction: Help Fulfill Your Doors Full Soundproofing Potential. Soundproofing: Blocks Sound & Drafts From Coming Under the Door. Won't Wear Out Like Mechanical or Flimsey Doorsweeps Keeps out Critters, too !