Specifications include, but are not limited to: Unit bid shall be a Towable / Portable Air Compressor; The unit bid shall be of such design and construction as to comply with the requirements hereinafter started and any parts or attachments necessary to form a complete, functioning unit must be furnished, whether specifically mentioned herein or not. Manufacturer identification plates shall be of sufficient size to be easily read must be conspicuously displayed and securely fastened to the unit(s). Paint application shall meet industry standards for professional automotive/ equipment type painting, including provision for rust protective primer(s), etc. The bidding of any item formally purchased from a single source (one manufacturer) shall not become a standard by model. All equipment shall be the standard product of a manufacturer regularly engaged in the manufacturer of such equipment and shall be the latest standard design that conforms to the specification requirements. The development of new machines and/or equipment by a manufacturer to equal or exceed previously single source machines and/or equipment shall not be restricted from competitive bidding