Have you ever encountered such an annoyance? Heavy indoor dust, air or water leaking windows, mosquitoes or insects entered into your windows, noisy room, etc. Now we have the Felt Weatherstripping to solve the troubles in our lives! Features Provides all season protection against moisture, drafts, dust, sound and insects. High density felt, soft and no harm to your hand. Fine and closely woven, less lint, can stand wear and tear. High tolerance, can be warped without distortion, durable and flexible. Adheres nicely and sticks well. Blocked the gaps effectively without interfering with the operation of the door. Widely used for sliding doors, windows, armoires, etc. Bring warm in winter and keep cool in summer. Material Synthetic fiber + Adhesive backing Color Black Size 11/32 (adhesive back) inch x 11/32 (brush length) inch 16 feet length Applicable 2.5mm-4.5mm gap How to Use 1. Clean the surface; 2. Mark the same height as the window or door; 3. Cut the excess strip; 4. Peel off the backing film; 5. Apply the seal strip to the window or door. Notes 1. Please be sure to measure the gap size of the door or window, and then choose the right size of the sealing strip you want. 2. The surface must be wiped clean before applying, keep the surface dry and free of moisture. 3. When the temperature is low, it is recommended to use a hair dryer to preheat the adhesive backing before using.