WerFamily 16mm Waterproof Self-locking Latching Stainless Steel Metal Push Button Switch Flat Top High quality and long lasting. Mounting hole size: 16mm; Head Diameter: 18mm Switch rating: 3A/250V AC; Switch combination: 1 NO; Operation types: Self-locking (Latching). Head shape: Flat; Enclosure material: Stainless Steel Degree of protection: IP67, IK08