This item is a red 16mm diameter momentary push button switch with 2pin terminals, model R16503. It is supplied as 1 piece and features no builtin lighting. Key benefits Momentary action: provides a brief signal when pressed and returns to the default state when released, ideal for pulse or trigger inputs. Compact and unobtrusive: 16mm diameter fits into small control panels and tight mounting spaces. Clear visual cue: red color helps users identify the button action quickly. Low power footprint: no lighting means no additional power draw or heat from illumination. Simple wiring: straightforward 2pin connection supports quick wiring into common control circuits. Key attributes Type: momentary push button switch Illumination: no lighting Terminals: 2pin Diameter: 16mm Color: red Model: R16503 Quantity: 1 piece Material: not specified in listing Action: momentary (returns to default position when released) Applications and use cases Panelmounted control where a short push is needed to trigger an action, such as start/stop commands in small machinery or equipment. Input for microcontroller or electronic projects requiring a momentary signal without a latching function. Nonilluminated control button in DIY projects, kiosks, or compact control enclosures where visibility and a clear press action are important. Installation considerations Use standard 2pin wiring connections compatible with the included terminals. Suitable for applications that do not require builtin illumination and benefit from a compact 16mm button footprint.