Economic type,with spring adaptor
Case: black steel (standard);black ABS(optional)
Ring: chromed steel(standard); N/A(optional)
Window: plastic(standard);Snap-in acrylic(optional)
Accuracy:temperature---2%; pressure---3-2-3
industrial type,with spring pocket
Case:black steel
Ring:chromed steel
Window:glass
Stem:75mm brass or as required