Vangmaster is pneumatic. It uses air not springs to hold the boom up. Pressure can be added or released to adjust height.

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Vangmaster is pneumatic. It uses air not springs to hold the boom up. Pressure can be added or released to adjust height.
All external purchase systems are 100% Harken parts with pre-measured and spliced line.
Mast and boom mounting hardware to match your application is also available. Just scroll down the page.
Tubes are made of hardcoat-anodized 6061-T6 aluminum helping prevent scratching and corrosion.