Product Type: Beadable Pen Material: Plastic shell Length: 14.7 cm Diameter: 1.15 cm Net Weight: 6 g Feature: Light-sensitive color-changing powder Suitable for indoor use due to light resistance Heat resistance: photosensitive toner exposure time 5-12 hours Indoor use color changing effect lasts several years Example use life based on sunlight exposure: - 2 years for 10 minutes per day - 1 year for 20 minutes per day - 3 months for 25 minutes per day
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