After sunshine during the day, the artificail stones in the night walkway to launch up to three hours of blue or green light, making your garden more beautiful. Adopting fine workmanship, these artificial stones can be used repeatedly, their life expectancy lasts up to 15 years. Made of good resin materia, they are harmless and safe to use. Diameter of the artificial stones is 2.2cm. You just need to put the pebbles on the edge of the walkway or flower beds, or use it for decorative vases, aquarium landscaping, gardening, swimming pool, bar, villa gardening potting, parks and so on. Item Name: Luminous Stones Material: Resin Wet Water: 1& Hardness: 1 Impurity: 0 Gloss: 90 Percent Compressive Strength: 2MPa Bending Strength: 1MPa Specific Gravity: 3 Gram/Square Meter Features: Luminous, Garden Decor, Artificial Pebbles Size Details: Diameter: 2.2cm/0.87" (Approx.) Notes: About 100pcs stones, quantity might has 1-5pcs more or less. Hope you can understand, thank you. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 100 x Luminous Stone