Nkiy Quen 2 Pcs 36 Inch Double Bubble Kerf Door Sweep Kit, 1-3/4" Wide Vinyl Concealed Kerf Weather Strip, Door Bottom Seal Strip Replacement to Block Dust Noise Reduction Package includes:2 x Double Bubble Kerf Door Sweep Specification: Material:Vinyl Color:Black Size:Details can be found in the size chart. Features: The double-bubble structure offers superior thermal insulation compared to single-fin seals. Its concealed installation design hides the seal within the door, ensuring a smooth, unobstructed exterior surface. It can fill gaps up to half the door height, effectively blocking cold/hot air, dust, noise, and moisture. Its classic black finish seamlessly complements various door styles.