Description: 16mm key switch lock 2 position with 2 keys, nice smooth action and easy to mount. Waterproof level, high temperature resistance and flame-retardant. Model: Two position key button LA16-16Y-11Y/2?Button head diameter: 16mm Contact Type: Sterling Silver Contacts?Installation size: 16mm?Front ring material: PC Working voltage: 6-380 (V)?3C rated voltage range: 37V-440V? Contact resistance: ?50M??Insulation resistance: ?1,000M?? Electrical life: 10 years?Mechanical life: 1 million (times)? Ambient temperature: -5 °C to +75 °C Package Includes: 1 Piece Key Button Switch 2 Pieces Keys