... sell various piezoelectric elements,piezoelectric sounders,piezoelectric ultrasonic tranducers and piezoelectric horns,electro-magnetic buzzers ... ovens,computers,calculators,digital cameras,eletronic dictionaries,ultrasonic planimeters,medical devices,micro-displacement positioner,high ... for magnetic buzzer as follows:-Material:ABS,PPO,PPT-Connection terminal:Pin,wire,SMD piezo ultrasonic transducer