4 piece set. 1 ,5x0,25inch, 2,5x0,25inch, 3,5x0,25inch, 4,5x0,25inch. These simple, straight channels make it easy to add movement to almost any image or die cut design in your collection. Get creative coming up with new and innovative ways to put them to use - four convenient sizes are included so you'll always have the perfect length at your fingertips. Use with Spin and Slide Discs or Slider Elements for smooth gliding interactive mechanisms.