Have you met this kind of problems? 1. air condition can't keep your room cold or warm 2. Always have dust on your surface. 3.Noise reduces your sleep quality. 4. Your floor usually gets soaked after winding and raining This is the reason we need these under door seals. With this entry door weather-stripping and seal the crack, make life more safe and more comfortable. A practical weather stripping for doors. Quantity: 1 pack Material: silicone Color: White Weight: approx 5.9 ounces Suitable gap: 0 to 1" Suitable door material: wood, glass, metal, plastic