Rockery Fish Tank Ornament Aquarium Hiding Hide Cave Underwater Decoration no.71 Material: Polyresin Size:8cm x 7cm x 5cm - 3.14inch x 2.75inch x 1.96inch. Type: Rock If you want color, please tell me. Delivery time: By Airmail: Generally, delivery to USA takes about 10-35 days. Delivery to Canada,AU, UK, and other European countries takes about 14-28 days.