?Tight Seal Rigid Flange,Easy to Install?With an unique inverted design, this door Weather stripping fit well with kerfs /slots. Simply trim to your length and insert the plastic flange into groove to finish a tight seal and refresh your old door. Never to worry about the it falling off. Full set 10.4 Feet/3.2m for 1 standard door. Fill door/window gaps from 1/4" to 9/16". Please measure the gap before purchase. ?Reduce Energy Bills All Year Round?The door insulation kerf tape can be installed in the groove around the door frame to fill the gap, making a tight seal to keep out noise,wind,dust, winter cold air and summer heat, keeps room cozy and quiet. Suitable for interior/ exterior doors, front/back doors with slots. Save energy and household electricity costs all the year. ?High Quality and Healthy, Longer Service? Kerf door seal is filled with high density PU foam, soft and highly elastic, can recover quickly after pressing, anti-collision and soundproof. The embossed outer cover is made of wear-resistant PE material, which is waterproof and anti-scratch,not easy to age. Odorless and healthy, the door sealing strip will bring a safe protection to your house. ?Wide Application?The kerf door weather strip is suitable for various home doors and windows with slots, such as security doors, steel doors, anti-theft doors, wardrobe doors, cabinets, sliding windows, plastic steel windows, etc., to meet different needs. ?Attention?Our weather stripping door seal strip is packaged in a roll. Please lay it out for 1 day before installation. It will return to its original shape and doesn't affect your normal use. Have any quality problems, please contact us through Amazon mails, and we will solve it for you as soon as possible.