Product description:
Model: Compression Spring
Material: Spring steel
Surface treatment: Blackening / Self color（Random sent）
Standard: GB
Wire diameter: 0.3mm-3mm 
Length: 305mm
Size: For example: 0.5x4x25mm; it means that the wire diameter is 0.5 mm, the spring outer diameter is 4 mm, and the length is 25 mm
Features: Uniform pitch, high elasticity, pressure resistance; complete sizes; high-quality materials
Note: There are positive and negative tolerances for dimensions.

Tip: This store also has the other sizes and material of springs, customers who need it can contact customer service for consultation.

As you squeeze a compression spring, it pushes back to return to its original length. Rate is the amount of force required for every inch of compression or, for metric springs, millimeter of compression. The higher the rate, the harder it is to compress the spring.

Package include:
According to your choice!