ISO (International Organization for Standardization) products are based on the international standards for measurement, color coding, gas specific international fittings (British, AFNOR, Australian, DIN, NIST, etc.) and characteristics related to their manufacture and use. European countries and other countries like Canada, Chile, Australia, Saudi Arabia use products based on these standards.
USA or ANSI (American National Standards Institute) products are based on the America National Standards for measurement, color coding and gas specific fittings. The United States of America and other countries like Argentina, Colombia, Peru, Thailand, Vietnam, use products based on these standards.
Not all products or configurations may be available in all regulatory jurisdictions.