Features:
Natural stone, with microporous, permeable and breathable, good for plants growth.
Different sizes and different shapes for every piece from natural.
Doesn't no harm to fishes, great decor for aquarium.

Specification:
Material: natural stone
Size: different for every piece
Weight: approx. 250g, 500g, 1000g (due to different shape per pcs, the weight will be within+-50g range. Thanks very much for your kindly understanding).
Color: yellow

Note:
Please allow differs due to different sizes for every piece.
Due to the different display and different light, the picture maybe a little different with the actual color of the item. Thanks for your understanding.