Specifications include, but are not limited to: Specifications have been developed by Region 4 and are intended to give information as to type and kind of service requested. Catalog numbers, brand names, or manufacturer's product or reference numbers used in the item specifications are intended to be descriptive, not restrictive. These references, as well as "approved brands" listed, are intended to identify and indicate the type of product being sought, and establish the level of quality desired. If any conflict exists in the item specifications between the product descriptions and any brand names or model or reference numbers used, the product descriptions will override the brand names or model number references.