Material：

Galvanized steel Plate (g)

Size：

∮150mm ~1800mm

The standard length is 3M and can be set to length.

Characteristics：

Swiss Spioro Standard arc seams, combined tightly.

The use of flying-type cutting, no burrs, construction safety.

In the middle of the spiral seam, there are three Swiss Spiro reinforcing type reinforcing ditch.

High strength, light weight, convenient construction.

Punching rate 30% ~ 40%.

With external pipe caliber production.

Suitable for use in double helix tube or silencer tube.