This pack includes 5 LA16 blue illuminated push button switches designed for 220V control circuits. Each switch features a 16 mm panel mounting hole, a builtin indicator light, and a selflocking (latching) action with a protective cover. The compact 16 mm footprint makes these switches suitable for control panels where space is limited. Key benefits Clear visual status: blue indicator light provides immediate feedback when the switch is energized. Maintained on state: selflocking (latching) action keeps the circuit on until the button is pressed again. Simple 220V control compatibility: designed to operate in standard 220V control applications. Durable panel mount: 16 mm mounting hole fits standard panel cutouts for reliable installation. Protection cover: included to help resist dust and incidental contact, improving durability. Key attributes Brand/model: LA16 Quantity: 5 pieces Voltage: 220V Indicator: blue light Mounting hole size: 16 mm Action: selflocking (latching) Panel mounting: suitable for 16 mm mounting hole Material: not specified in listing Finish/color: blue indicator light Protection: protective cover included Specifications and compatibility Type: illuminated push button switch with selflocking action Panel cutout: 16 mm Electrical rating: 220V operation stated Light function: builtin indicator light (blue) Packaging: set of five switches with protection cover Applications and use cases Start stop control for small machines and DIY equipment: use the selflocking action to keep a device on until intentionally turned off. Panel status indication: add clear on/off status indication to control panels, automation boxes, or electrical cabinets with a 220V control circuit. Home automation and hobby projects: integrate into hobby electronics projects or workshop control panels where a durable, illuminated, latched push button is useful. Replacement or expansion: convenient as a spare or part for multichannel control panels in small machinery or testing setups. Installation notes Install in a panel with a 16 mm mounting hole to ensure proper fit. Connect to a 220V control circuit and use the builtin illumination to provide visual feedback when powered. The protective cover helps protect the switch from dust and incidental contact during use. This description reflects the product's stated brand, model, features, and specifications including the LA16 designation, 220V rating, 16 mm mounting, blue indicator light, selflocking action, and the protective cover, provided in a 5piece pack.