The Tube Clamps produced by our company is accoring to German Standard DIN3015 Teil 1

  Light clamp series can be applied in 6 series for normal mechanic pressure tube o.d.6 to 57mm   

  Twin clamp series can be applied in 5 series for normal mechanic pressure tube o.d.6 to 42mm

  Heavy clamp series can be applied in 10 series for hight mechanic pressure tube o.d.8 to 406mm