Installation Opening: 12mm. Flat Head Size: Approx. 21.5 x 12mm / 0.8 x 0.5in. Optional Style: Flat Head, High Flush. High Flush Size: Approx. 12 x 23mm / 0.5 x 0.9in. Suitable for electromagnetic starters, relays, button switches, car modification, host buttons, buttons and button devices.
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