uxcell 4.5x4.5x3.8mm Panel Mini/Micro/Small PCB SMD SMT Momentary Tactile Tact Push Button Switch 10PCS Features momentary push button, SMD mounting, membrane switches. Used in the fields of electronic products, household or office appliances, sound equipments, digital products, and more. Product Name: Push Button Switch Pin Number: 4 Dimension: 4.5x4.5x3.8mm/0.18*0.18*0.15inch(L*W*H)