Schneider ZB4BT2 Push Button Operator: 22 mm Size, Maintained Push Maintained Pull, Black, Metal Size:22 mm UL 94 V 0 Removable Bezel Yes UL 94 V 0 Removable Bezel Yes Scale Type Single Case Construction Solid Front with Pressure Relief Back Includes Mounting Hardware No Freeze Resistant Movement No Primary Pressure Range 0 to 30 Sensor Type Bourdon Tube Vibration Resistance None Burst Pressure 1 Poly V Belt Drive Type of Operator 40mm Mushroom Head UL Basic Material Metal Accessory Group B IP Rating 66 Product Type Push Button Operator Reset push pull Ambient Air Temperature For Storage 40 70°C Electrical Composition Code C11 3 single front mounting C15 1 single front mounting C7 4 single front mounting C8 4 single and double front mounting C10 4 single and double front mounting Shock Resistance 30 gn 18 ms) half sine wave acceleration IEC 60068 2 27 50 gn 11 ms) half sine wave acceleration IEC 60068 2 27 Protective Treatment TH Shape Of Signaling Unit Head round Head Type standard Operator Profile black mushroom Ø 40 mm