2043T 1 Qt. Pressurized Siphon Cup Assembly - Straight Nipple - Teflon
This is the previous version cup assembly (Straight Nipple) installed (prior to September 2019) on the standard spray guns with a TEFLON coating inside.
See 2042 for full description.
The assembly includes the 2024 Pressure Tube, a fitted 2036 Gasket and 2038 Diaphragm. It is the diaphragm that helps prevent paint entering the pressure tube. It acts as a shield.