High quality Iron Bearing Spring Box for Rolling Shutter Door

♦ Quality insurance

♦ Supply with best price and service

♦ MOQ: 500 pieces

♦ Surface finishing: silvery galvanize

1.Name: spring box,rolling door accessories,rolling door parts.

2.Spring box for volume gate.

3.Material: ironand iron beads, bearing, Nylon beads.

4.Model : iron Beads Spring box, bearing spring box, Nylon beads spring box.

5.Inner Diameter: 39mm,41mm,51mm,61mm,76mm.

6.Exterior Diameter: 200mm,205mm,210mm,215mm,220mm,240mm.

7.Spring Width: 38mm,50mm,60mm,65mm,75mm.

8.Assort Pipeline Diameter: 38mm,42mm,50mm,60mm,75mm.

9.Suitable Relax Width: 3~5m.

10.Material thickness:0.8(surface of iron) /1.0(ear) /1.2( amd 1.0/1.2/1.5

11.According to the size of outer diameter and inner diameter of the beads used in the different.