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D.I.D. - NZ Roller Chains
- Highest quality of non o-ring chain in the overall combined performance D.I.D. is the #1 chain manufacturer in the world Solid rollers Shot-peened parts High cylindrical and roundness accuracy Exacting tolerances provide low friction Pre-stretched Extended riveted bushing "Anti-Kink" design Special alloy steel Average tensile strength of 5,740 lbs.