Professional Tripod Boom Arm???. Length up to 16.5in / 42cm. Knob-type locking system, easy to operate;. With a Extra Detachable Extender???.
Koolehaoda Tripod Extension Arm,16.5" Horizontal Center Column Tripod Extension
2-Section Alloy Tripod Center Column Shaft Extension Tube V5E9
2-Section Alloy Tripod Center Column Shaft Extension Tube O3T7
ARTCISE Carbon Fiber Tripod Travel Tripod Lightweight Monopod w/ Center Column
Camera Tripod, 78.7" Tall Aluminum Tripod & Monopod Stand with Center Column
Leofoto HK-01 Non-Center Column Tripod Weight Hook System
