Upper limit: 4000mm. 　　

Thickness of alloy: 2.5-3.5mm. 　　
Alloy hardness: HRC58._~70

Diameter: 200 - Φ Φ 200

Diameter: Φ 40 - Φ 300   

Length to diameter ratio L/D = 4-6

Diameter: 45-300 Φ Φ   

Length to diameter ratio L/D = 8 to 20

Diameter: Φ ? 300-60    

Length to diameter ratio L/D = 12 to 18