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 Dark annealed wire, also known as black annealed wire, is an annealed wire that is coated with a black oxide layer to provide corrosion resistance. This makes black annealed wire suitable for outdoor applications and ensures a longer service life, even in harsh environments.

Another benefit of adjustable compression springs is their ease of installation and maintenance. Unlike traditional compression springs, which are fixed in their compression length, adjustable compression springs can be easily adjusted without the need for specialized tools or equipment. This makes them a cost-effective and efficient option for many applications.