WerFamily 12mm Waterproof Momentary Type Stainless Steel Metal Push Button Switch Round Head Resetable 250V 3A 1NO 2 Screw Termianls Mounting hole size: 16mm; Head Diameter: 18mm; Depth (Including Contacts): 22mm. Switch rating: 2A/36V DC. Switch combination: 1NO; Operation types: Momentary (Resetable). Head shape: Round Head; Enclosure material: Stainless steel Degree of protection: IP67, IK08