This is a new stock EWES Stålfjäder AB mooring tension spring designed for marine docking and mooring applications. Built to act as a rope shock absorber, this spring helps reduce sudden load forces on mooring lines, cleats, and dock hardware caused by waves, wind, and vessel movement. The original manufacturer tag lists GM series specifications, including galvanized and stainless steel variants for rope diameters approximately 12–20 mm, with maximum extension ratings of 150 mm or 200 mm depending on model. Manufactured in Sweden by EWES, these springs are known for heavy-duty construction and suitability for demanding marine environments. Ideal for boats, docks, and industrial marine use.