Durable Rolling Shutter Spring

We are engaged in exporting and supplying excellent quality Durable Rolling Shutter Spring in Yichun, Jiangxi, China. Rolling shutter spring for thickness 0.15mm-2.5mm, width 250mm, tolerance an flatness according to the DIN standard

1. The hardness is 30-55 HRC as per customer requires

2. Finish: Blue, bronze, yellow, gray, etc

3. Edge: One or both edges round square chamfered and beveled

4. Material used for rolling shutter spring

5. Good flatness and uniform hardness

6. Surface treatment: Bright /blue/yellow/grey

7. Edge: Round /slited/milled

8. Cold rolled/Hot rolled steel strip

9. Tolerance of thickness: +/-0.01mm, width: +/-0.1mm

10. Packing each bundle with anti-rust paper and light oil then wrapped in plastic film or hessians cloth with metallic pallet and put in 20ft or standard sea worthy.