★Material★ – Photoluminescent pigment + resin. About 18×25×11mm each. 200PCS pack.
★How to make them glow★ – No electricity required. Put them under sunlight or lamplight to absorb light for an hour them they will glow for hours.
★Make your yard cool★ – Line a walkway, edge a flower bed or fill a planter with these pebble, make your garden or yard absolutely unique and cool!