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