Flanged diaphragm seal for Siemens pressure transmitters, Flange/Process Type: probably ASME B16.5, 3 inches, class 150 (as in similar configurations)., Material of wetted partsA: 316L stainless steel (standard)., Filling (liquid): M5 silicone oil (standard optimized for temperature range)., Connection: Direct mounting, straight connection., C11: Option code that further specifies the flange or process connection, likely confirming ASME B16.5, 3", Class 150., D66: Option code that specifies theStandard Ambient Temperature Range -10 to +50°C, unless a range other than the paired transmitter or another option is specified