Applications: Top Rail Interlock Categories: Lift & Slide, Lift & Slide, Sliding Door Hardware, Weather Seals & Weatherstripping, Weatherstripping, Window Hardware Description Description DescriptionPhoto GalleryDescription Part Number: 5527 This Top Rail or Interlock weatherstrip is available by the foot or by the spool (720 ft). Applications: Top Rail Interlock Photo GalleryWeatherstrip #5527 Weatherstrip #5527 Weatherstrip Profile