Check the listing for details. New Dwyer 1823-80 Pressure Switch. Condition: New – Open box, Made in United States. Listed at 39.99 USD. If you have to get a hold of us, look us up on the net. We try to be as descriptive as possible for each item and represent each item in the pictures. New Open Box. We have very reasonable rates. What is your phone number and extension if you have one?.