This International Standard specifies the design, content (i.e. hazard symbols and text) and application of precautionary labels intended for use on individual gas cylinders containing single gases or gas mixtures. Labels for cylinders of bundles and labels for bundles are not covered by this International Standard. This International Standard establishes the form of presentation and content of the documents which a manufacturer should provide with cranes and lifting appliances (hereafter called "equipment"). Such documents give technical information and include acceptance documents for the equipment to facilitate its installation, testing and use. Specimen acceptance documents are given in the annex. This part of ISO 7750 specifies the dimensions necessary for interchangeability of filter elements for air filters generally used in commercial vehicles. Two element types, A and B, are specified; they differ in the bottom end cup design and require different installation conditions (see annex A). Types A and B are not interchangeable. The selected sizes specified in Tables 1 and 2 are based upon popular elements currently on the market. This part of ISO 7750 may be used for other air filter applications where no specific standards exist.