ELEWIND 16mm 1NO1NC 4pin Selector switch 2 position maintain (PB163Y-11X/21) Part number:PB163Y-11X/21 Install diameter:16mm Switch rating: 3A/250VAC Shape: Round(Square and rectangular can be choose) Function: 2 Position maintain Terminal:4 PIN terminal Crust material: Plastic Temperature: - 25 to 55 Degree