What are the physical pipe connection sizes

Is this a universal flame rod

including models F4FP045H06T2CH

the contacts should be open

Can I use this for non-York VFD installations

Laars Heating Systems RE2334700 Pressure Switch 321042-401 What are the physical pipeThe Laars RE2334700 Air Pressure Switch is a critical safety component engineered specifically for the Laars NeoTherm boiler series, including models NTH 150 through NTH 850. As a veteran grade HVAC replacement part, this switch monitors the differential pressure within the combustion chamber, ensuring that the inducer fan is moving sufficient air for safe combustion. If the boiler pressure switch detects a blocked vent, intake obstruction, or fan