1) The spring back tester is divided into 120 sector parts, representing the degree of resilience in each lap；

2) The fan-shaped part on the rebound instrument dial is drawn from the theoretical center of the relaxation coil；

3) Test range: size below 1.6mm of round wire；

4) Comply with NEMA standard;

5) Springback winding speed: 7±0.5 rpm;       

6) Indication deviation≤1°；

7) A full set of stainless steel weights.