Specification: size19.17*19.17MM0.75''*0.75'' inch Note9pcs key switch can be used alone Package Includes: 9pcs* Switch Breakout Prototype PCB Boardnot included buttons- This key switch is the most advanced mechanical keyboard switch with a satisfying click feeling, strong reliability, and conforms to the global gaming and programming keyboard standards.- The switch is easier to adapt to projects based on breadboard or perforated board.It's great help for making custom keyboards.- This is a perfect prototype development tool, suitable for single-key user input to a fully customized 101-key keyboard project.- In addition to disconnecting the switch contacts to the breadboard-compatible header connector, it also provides access to optional switch-mounted LEDs.- The design of the pins takes into account the keyboard matrix, so you can interconnect any number of boards into a row and column configuration as needed, so that the I/O pin requirements are as low as possible.extractor de teclas*** Todos nuestros productos son exportados desde Estados Unidos hasta tu casa!*** Cualquier pregunta no dudes en contactarnos, estamos para servirte!