Features: Normally open push button switches (4 pack) feature aluminum contacts for conductivity and aluminum housing, designs for smooth electrical control in demanding applications. Engineered with tactile responsiveness and sturdy construction, these momentary switches deliver actuation and easy panel installation through their portable, maintenance designs. Ideal for electronics engineers, enthusiasts, and appliance repair technicians requiring dependable switching solution for prototyping or equipment upgrades. For integrating into household appliances, industrial control panel, robotics projects, and customes circuit boards requiring momentary control functionality. Each switches maintains high performances, offering various accessory with 12 250V systems through standardized 19mm mounting. Specifications: Component: Aluminum oxidation Size: 2.9x1.5x2.4cm/1.14x0.59x0.95inch Type: As Picture Show, Two Type to Choose Package Includes: 4pcs Button Switches note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.