Blazer® True Fletch offers a fast and easy way to fletch arrows. It fits arrows from 0.219 -0.375 (5.6 - 9.5mm). Slowly submerge in boiling water to apply. Store in a cool place until use. Blazer® True Fletch measures 5 (12.7cm) in length and weighs an average of 27 grains. Certified Crossbow Compatible.