HEAVY DUTY ALUMINUM & DURABLE PP BRISTLES — Each set features a 6063 aluminum housing with -row high-density PP bristles and includes 4 SUS304 stainl steel screws for se installat. Built for long-term durability and designed to resist wear,moisture,and temperature chans. FULL COVERA FOR WIDE DOOR GAPS — The 3-inch double brush design helps seal larr gaps under doors,effectively bloing drafts,dust,insects,and debris. Ideal as a gara door seal,barn door seal,or exterior door draft sper ADAPTS TO UNEVEN FLOORS FOR A BETTER SEAL — Flexible,high-density bristles conform to uneven surfaces like concrete,tile,and wood,helping maintain consistent contact for impd sealing performance SE SCREW-ON INSTALLAT,NO PEELING — Pre-drilled holes and included screws provide a stable,long-lasting fit that stays in place during daily use,unlike adhesive seals that may loosen or fall off over time.Installat tip: After trimming,ntly pr both ends of the aluminum housing to se the brush strips VERSATILE FOR MULTIPLE DOOR TYPES & SPACES — Suitable for gara doors,roll-up doors,barn doors,warehouses,and exterior doors. Helps drafts,blo dust,and imp indoor fort in residential and mercial environments.