Description:Product: Copper FeetShrapnel: Composite silver bullet piece1. temperature range: -10 - 60 °C2. Rated Load: DC 12V 0.5A3. the contact resistance: lower 30MΩ4. insulation resistance: higher = 200mΩ5.voltage: AC 250V (50Hz) 1min6. the action force: 100 to 300gf7. Life: 10000 times8. size: 4 * 4 * 1.5mm