D.I.D Standard Drive Chain, recognized as world class quality chain, is not standard by any means. All D.I.D Standard Drive Chain incorporates the following features to easily exceed ANSI Standard:
The DID standard roller chains are available in 14 sizes ranging from RC25 to RC240. All are in conformity with JIS (Japanese Industrial Standards) and ANSI (American National Standard Institute) standards.
"Extra Strength Connecting Link"