SCI R13-81 RED Micro Push Button Switch

SCI-Micro-Miniature-Push-Button-Switches-SCI-R13-81-RED-P-Micro-miniature-push-button-switch-from-the-SCI-R13-81-series-with-round-actuator-in-red-with-single-pole-momentary-push-to-make-contacts-P-SCI-R13-81-RED-Micro-Push-Button-Switch

Price: £ 1.17 from Rapid Online Rapid Electronics Ltd.