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Original vintage Monroe Chemical Co. Model 40-A automatic control accessory developed especially for drilling and tapping operations; actuated by downward spindle movement; compatible with all four Mister Cool-Tool models.
The Model 40-A was designed to automatically control operation of a Mister Cool-Tool mist unit during machining. Period Monroe literature describes the 40-A as an automatic control valve used for mechanical intermittent mist operation.
Factory literature identifies the Model 40-A as including:
IMPORTANT – FACTORY SEALED:
This listing is for the vintage factory-sealed Model 40-A box shown in the lead photos. The original paper sealing tape remains intact, and the box has not been opened by us. Because the package remains sealed, the contents have not been individually inspected or tested.
Photos of an open Model 40-A from the same long-term dealer inventory are included for reference only to illustrate the type of unit and components. The open unit shown in those reference photos is not the unit included in this listing.
The original sealed box has substantial age and long-term storage wear, including staining, discoloration, scuffs, softened/worn corners and general shelf wear. Please review the photographs carefully.
Price is for ONE factory-sealed Monroe Model 40-A.

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