Bohning Blazer QuikFletch Neon Green/White 6 pk.. They easily install on arrow shafts with a diameter of 14/64" to 24/64".Each Blazer vane is set at atwo degree offset for optimal performance. You never know when you are going to damage a vane so these are a great thing to keep around for a Quik fix.Easy to install and easy to replace. To install the Quik Fletch: boil water place the Quik Fletch at desired location on arrow shaft and nock end submerge the Quik Fletch in the boiling water and let the Quik Fletch dry. Specifications for Bohning Blazer QuikFletch: Manufacturer: Bohning Quantity: 6 Features of Bohning Blazer QuikFletch: Easy Installation Submerge in boiling water to activate Store in a cool place until use 5.25" Long 27 grains Proudly made in specialized factories Package Contents: Bohning Blazer QuikFletch Easily installs on shafts from 17/64 to 24/64 diameter. simply submerger into 180 degree water.