1. Size: single switch is about 2.8x1.55x0.8 cm, double switch is about 4.15x1.55x0.8 cm 2. Weight: about 9 grams for single switch, about 15 grams for double switch 3. Material: aluminum alloy 4. Purpose: modified switch (headlight/spotlight/overtaking light/power off/start/ignition/horn) 5. Aperture: 4mm 6. Applicable models: GM