Material: Metal Size: 12*9.5mm(Foot spacing About 7.6mm) Color: 3V(red)/5V(blue)/12V(black) Product list:5 pcs Buzzers Features: 1. This DC long sound electromagnetic active buzzer provides a stable and loud sound effect that can be applied to a variety of scenarios requiring audio prompts. 2. Due to its compact design, installation is very simple, and users do not need any specialized tools or skills to easily complete. 3. These buzzers are carefully built to withstand the wear and tear of everyday use. They have a long life and are more reliable than some other inexpensive buzzers. 4. This DC long sound electromagnetic active buzzer can be used for a variety of different products and projects, such as natural gas, liquefied gas alarms, reverse alarms, electronic clocks, electronic toys and so on. Notes: 1.Please allow 1-2cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is the same.