This slim shape clear purple flight and short clear purple stem incorporates the innovative Condor Zero Stress concept. This short clear purple slim flight is measured from the ridge of the screw to the joint/link between the clear purple slim flight and the short shaft. Shaft length: 21.5mmThis slim shape clear purple flight and medium clear purple stem incorporates the innovative Condor Zero Stress concept. This medium clear purple slim flight is measured from the ridge of the screw to the joint/link between the clear purple slim flight and the medium shaft. Shaft length: 27.5mmThis slim shape clear purple flight and long clear purple stem incorporates the innovative Condor Zero Stress concept. This long clear purple slim flight is measured from the ridge of the screw to the joint/link between the clear purple slim flight and the long shaft. Shaft length: 33.5mm