Description: Easy to clean, safe to use both on land or in water. Stylish skull aquarium ornament, brings an exciting habitat to your fish tank. Made of high acrylic resin, non-toxic and odorless,insoluble in water. Can be used in aquarium fish tank or reptile terrarium' decoration to provide shelter, hiding spots, entertainment venues for reptile or fish. it is a great place for them to hide and play. Suitable for both salt and fresh water,fit for fish, tortoise, lizard, frog, snake, spider, etc. Specification: Shape 1 Size:(LxWxH) Approx.11.5x14.5x14.5cm/4.53x5.71x5.71inch; hole length:Approx.2.5cm/0.98in; the length of the hole mouth:Approx.2.7cm/1.06in Shape 2 Size:(LxWxH) Approx.13x9x6/5.12x3.54x2.36in;the length of the hole mouth:Approx.4cm/1.57cm; the height of the mouth:Approx.2.5cm/0.98in Package Includes: 1 Piece Resin Ornament Note: Please allow slightly difference to manual measurement. Color may be slightly different since different monitoy.Thanks!