uxcell 2-Piece Silicone Fish Tank Sea Urchin Set, 2.2-Inch, Purple/Yellow Aquarium Sea Urchin Decoration; Material : Silicone, Ceramic Base Dia : 2.7cm/1";Total Size : 5.5 x 7cm/2.2" x 0.8"(H*Approx.) Color : Yellow, Purple, White Weight : 52g 2 x Aquarium Sea Urchin Decoration