BUY B3F-4005 https://www.utsource.net/itm/p/11665338.html

B3F-4005 is a tactile switch manufactured by Omron. It is a momentary switch with a flat top surface and a round actuator. It has a rated operating force of 400gf and a rated operating travel of 0.5mm. The switch is designed for use in a wide range of applications, including consumer electronics, automotive, industrial, and medical equipment. It is suitable for use in applications where a tactile feedback is required. It is also suitable for use in applications where a low profile switch is required. The switch is RoHS compliant and is available in a variety of colors. (For reference only)