4″ Left Wing Parabolic or Round Back Shape. This feather will average 15.5 millimeters tall at It's highest point. Its average weight will be 2.76 grains each and is used for both hunting arrows and target arrows. This feather can be used on all types of arrow shaft materials. Is best applied with Gateway Feathers G1-Glue and can be used by either right handed or left handed archer.