Housing is cast iron and painted to offshore spec. The process connection is 1/2 (half inch) probably NPT. Is very similar at 1/2 and will fit / seal OK.
Pre settings can be changed please look at the instructions in photos for details. The price is for 1 unit although I have 2 of these and sensible offers for both will be considered. This item is in the category "Business, Office & Industrial\Electrical Equipment & Supplies\Switches\Pressure Switches".bobby" and is located in this country: GB. This item can be shipped worldwide.