1.1 'Helvetica Neue', Helvetica, Arial, sans-serif; WHITE-SPACE: normal; MARGIN-BOTTOM: 10px; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px\" class=\"title\">Key Specifications/Special Features

This fitness tension spring is made by advanced automation machine with high temperature to strengthen and finalize the shape, which has high accuracy and good stability.

Our tension springs meet the demands of EU RHOS, it's easy to assemble and rust proof. What's more, it has been proved by experiments that it can stand more than 100,000 times of fatigue testing.