WerFamily 16mm Waterproof Momentary Type Stainless Steel Metal Push Button Switch Round Head 250V 3A 1NO SPST Momentary switch: Push & Hold,ON; Release,OFF. 100% Brand new and high quality, mechanical life for 500,000 cycles. Mounting hole size: 16mm; Head Diameter: 18mm; Depth (Including Contacts): 23mm. Switch rating: 3A/250V AC. Head shape: Round Head; Enclosure material: Stainless steel Switch combination: 1NO; Operation types: Momentary Degree of protection: IP67, IK08