1.1 This specification establishes the requirements for seamless copper and copper-alloy rectangular tube intended for use as transmission lines in electronic equipment. Five types of material are specified having the following nominal compositions:2 Copper or Copper Alloy UNS2 No.  Previously Used Designation Nominal Composition, %  Copper  Zinc Phosphorus           C10100 Copper, Type OFEA 99.99B ... ... C10200 Copper, Type OFA 99.95B ... ... C10300 Copper, Type OFXLPA 99.95B ... 0.003 C12000 Copper, Type DLPA 99.90B ... 0.008 C22000 Commercial    bronze, 90 % 90 10 ...(A) Types OF, OFE, OFXLP, and DLP are described in Classification B224.(B) Minimum copper percentage. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard. 1.3 The following safety hazard caveat pertains only to the test method(s) described in this specification. 1.3.1 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.