Siemens Sirius 3SU1 Emergency Stop with mushroom head. Pedal pressure and emergency stop button (Electrical Engineering / Push buttons and signal units / Push buttons). Principal data: diameter 40 mm, color Red, contact type 1NC. Supplied under manufacturer part number 3SU1150-1HB20-3CH0, EAN 4011209956872, HS code 8536.50, country of origin Germany.