Lookatool 100 Pcs Glow In The Dark Stones Pebbles Rock For FISH TANK AQUARIUM Garden 100% brand new and high quality. Quantity: 100. Material:Plastic. Line a walkway, edge a flower bed or decor garden ,fish tank with these unique pebbles. The size of 1 pc Pebble:1.7cm x 2.4cm/0.67'' x 0.94''(approx).