Spring box flywheel box

[Outer diameter] : 220mm

[Inner diameter] : 70mm

[Product Height] : 82mm

Matching pipe diameter: 80-83mm

[Applicable door width] : 3-5m

Can be customized according to your requirements

1: Name: spring box, shutter door accessories, shutter door accessories.

2: suitable for the old manual rolling gate.

3: material: galvanized iron. Protective shaft iron ring + nylon ball

4: material thickness :0.75mm*0.85mm*1.2mm according to the size of the outer diameter and inner diameter of the bead used for different.