Kromer balancers from Carl Stahl are probably the most reliable balancers in the world. Independently tested, they have demonstrated their unmatched longevity.
The range includes: Spring balancers (known as retractors by Kromer); Zero Gravity Balancers and Air Hose Balancers.
The range has some of the highest capacity balancers offered anywhere, going right up to 300kg. Ratchet locks are available on many, as well as 3m cable lengths.
Kromer from Carl Stahl: Install and forget.