Model: Compression Spring Material: Spring Steel Surface Treatment: Nickel plated Wire diameter: 2.5mm Outer diameter : 15mm - 40mm Length : 30mm - 100mm Note: due to the differences in shooting scenes and technology, there will be a chromatic aberration between the photos and actual colors. Specifications: wire diameter d * outer diameter D * total length L (mm) For example: 2.5*16*100mm means: wire diameter 2.5mm (steel wire thickness) * diameter 16mm (spring outer diameter) * length 100mm (total length).
eBay