Flex Fletch Silent Knight 3in White Vanes - 36 Pack - The Silent Knight Vane is built for bowhunters with a design that is fast, quiet, smooth and tapered for optimal flight without alerting game. These 3in vanes are 30% thinner than thermoformed vanes and have a lower profile that produces less drag and wind drift. 3in vanes have more surface area to produce more stability in flight, allowing you to confidently shoot fixed-blade broadheads. Testing has shown an increase in velocity by 2 fps when compared the same arrows fletched with popular 2in thermoformed vanes. These made in the USA vanes measure .485in high and weigh 6.8 grains.