ITEM NAME:100 Pcs Electrical Tactile Push Button Micro Tact Switches 4-Pin DC 12V asf MCW.100x Tact Switches. Insulation resistance: 100mÃŽ ©min 100V DC. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. Counting by weighing, there could be  ± 2pcs quantity deviation.