Specifications include, but are not limited to: A. The Contractor shall maintain a supply of contacts, coils, leads, lubricants, wiping cloths and other minor parts on his service vehicle for the performance of routine preventive maintenance. B. The Contractor shall maintain a supply of spare leading and replacement parts in their warehouse inventory. This inventory shall include the following: various sizes of piston packing, controller switch contacts, selector switch contacts, solid state components, door hangers, rollers, hoistway limit switches, and other related parts that would be required to make necessary repairs. All replacement parts and materials shall be specifically designed for the elevators on which they are used. The Contractor shall provide replacement parts from the original manufacturer's parts. Substitute parts may be utilized on the approval of the Maintenance Supervisor or his designee. The State shall have the right to inspect the Contractor's shop facilities for repair and spare parts inventory at any time.