Material:spring steel

Outer Diameter：8~50mm
inner diameter：4~25mm
Length：20~300mm

Yellow - TF (Lightest Loading): can be compressed 58%
Blue - TL (Light Loading): can be compressed 48%
Red - TM (Medium Loading): can be compressed 38%
Green - TH (Heavy Loading): can be compressed 28%
Brown - TB (Super Heavy Loading): can be compressed 24%

Load Index: Yellow < Blue < Red < Green < Brown 

Die springs are widely used in stamping moulds, metal die-casting moulds, plastic moulds and other elastic motion precision machinery and equipment, automotive and other fields. Description:Yellow, blue is mainly used for plastic mould assembly, red, green, brown is mainly used for hardware assembly.
Rectangular die springs have the characteristics of small size, good elasticity, high stiffness, high precision, rectangular production material surface colour coating (plating) to distinguish between different loads, beautiful appearance and so on.

Purchase as many as you need, thank you very much for your choice!