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1) Material: manganese steel or Customer requirement 2) Inner diameter: 5-150mm or Customer requirement ( this type clamps don't have the adjustment range, the inner diameters is the clamps under natural state. )
3) Surface treatment: colour zinc-plated, white zinc-plated, dacormet or Customer requirement
4) Corrosion resistance, neutral salt spray test for 240 hours.
5) No hydrogen embrittlement and keep the stability of material mechanical properties
