Mechanical, medium-loud buzzer. Ideal for school projects. 16.9mm x 23mm (33.38mm base mounting tabs, 1.1" centers) x 15.39mm body. 9 Vdc, can operate @ 3 Vdc. 4.5" long leads.
TDK # SDC161425-01. 5 Vdc (operates on 4-8Vdc) electromagnetic beeper. 16mm diameter x 14mm high. 1900Hz. 85dBA/10cm min. Average current, 30mA. PC pin terminals on 5mm centers.