Inside this tin is 150 perfectly sized balls of wax ready to use. These pellets are exactly what you need for use with Yigal Mesika reels such as the Spider Pen or Tarantula they are alos perfect for use with any other invisible thread effects or products. This ingeniously designed tin has the wax right at your fingertips. Simply push down on the top of the box to remove the lid, and to replace the lid squeeze the sides and it will lock shut. Genius.