Adhesion guaranteed on TAC Vanes fletchings when you use TAC Vanes Primer Pen with TAC Vanes Glue Tough. Accurate. Consistent. Mid-profile hybrid design for ideal clearance built with proprietary polymer blend material Revolutionary design promotes spin for a straighter trajectory Optimum stiffness reduces drag, maintains downrange speed Excellent memory for consistency Unmatched silent flight for hunting Designed for hunting; use with all broadheads, 3D and indoor target arrows Dimensions: 2.75" x .475" Weight: 6.4 grains