Specifications:

1 M explosion-proof tube

1.5 m explosion-proof tube

1.5 m encrypted explosion-proof tube (electric polishing)

1.5 m encrypted explosion-proof tube (electroplated)

1.5 m spring tube

1.5 m encrypted explosion-proof tube (silver powder)

1.5 m encrypted explosion-proof tube (high standard)

2 m encrypted explosion-proof tube (electric polishing)

2 m encrypted explosion-proof tube (electroplated)

2 m spring tube

2 m encrypted explosion-proof tube (silver powder)

2 m encrypted explosion-proof tube (high standard)

1.5 m encrypted explosion-proof tube (European standard)

2 m encrypted explosion-proof tube (European standard)