The Ek-Archery external arrowhead is intended for all laminate arrows for bows from the manufacturer Ek-Archery.You can simply glue this spare tip to the end of the insert (body) of the arrow.The inner diameter of the tip is 7 mm. Ek-Archery arrow tip outer Material: plastic Purpose: for bows up to 40 lbs Type: outer Inner diameter ID: 7 mm Color: red Manufacturer: Ek-Archery