Length: 1.8 inches Material: Plastic Specifications: 50 pieces/box Feature: 1. 1.8-inch plastic spinning vane, thickness: 0.1mm 2. The set is equipped with 4 sheets of double-sided tape and 10 sheets of single-sided tape, which helps you fix the vanes without needing to buy extra glue to fix the vanes. 3. The spiral vanes rotate quickly, which effectively contributes to correcting the trajectory of the arrow's fall and improving aiming accuracy. 4. The new upgrade design enhances the tightness of the seal on both sides of the arrow vane. 5. Black adhesive tape with a vane design makes it easier to get started.