M2cbridge Aquarium Fish Tank Rock Pirate Ship Vessel Hiding Cave Landscape Decor Ornament Material:Resin/Plastic Size: L 5.7"x W 2.1xH 4.7" Natural and realistic appearance; Safe and non-toxic Provides aeration for a healthy aquatic environment; Pirate Ship, While the size seems small, but with different specifications in the tank can have a different mood effects