WerFamily 5 Pcs 16mm Waterproof Momentary Stainless Steel Metal Push Button Switches 250V 3A 1NO SPST Flat Top 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: Flat; Enclosure material: Stainless Steel Switch combination: 1NO; Operation types: Momentary; Degree of protection: IP67, IK08 E-packet post from China (7~15 Days to US), comes with tracking number.