Control Bar with Leaders - PROReplacement Bar for Navigator Pro. Adjust the bar size to fine tune the turning speed of your kite. You have the option of 45 50cm or 50 55cm bar lengths to match our full range of kites and give the desired amount of leverage. The cassettes on either end of the bar enable the bar length to be extended or retracted by 5cm simply pull them out, rotate 180 degrees and snap back into place. Soft bar ends ensure nothing hard comes in touch with you or