... : 3cm-5cm. 3. Color: Red, blue, green. Halloween Gift, Christmas Gift, Led Pin Button: 1. Material: PCB.3. Size: 3cm-5cm ... screwed up the product begins to sparkle with diversified light.5. Stop flashing when the screw is loosened ... 9. Packing: EVA.Halloween Gift, Christmas Gift, Led Pin Button, Light up Pin, Light Button, Led Badge, Pin Badge, Pin Button. Halloween Gift, Christmas Gift, Led Pin Button