CONTROL THERMOSTAT for Tuttnauer Autoclaves 1730, 2340, 2540, 3850 & 3870 Models 30” copper capillary tube with a 3/16" dia. x 5-1/2” lg. bulb Operates from 0 to 32 PSIG This is a "Pressure Stat" type device. The bulb is open ended. Includes: Control Thermostat and Knob Fits: To Rear Steam Manifold Assembly Model(s) This Part Fits: 1730M, 1730MK, 2340M, 2340MK, 2540M, 2540MK, 3850M, 3850MK, 3870M, 3870MK, Valueklave (1730 MKV) RPI Part #TUT007 OEM Part #01620101