This is a natural material derived from American cactus. It has a porous interior with a unique hole structure, giving it a natural texture and presence. It can be used as a perch for birdcages, as well as for displaying air plants and houseplants, and as a layout material for aquariums and terrariums. When placed in water, it releases natural tannins, which helps stabilize water quality and create a natural atmosphere. 【Size】 Length: Approximately 15cm ・Diameter: Approximately 2.5cm x 3 pieces ・Diameter: Approximately 3cm x 1 piece ※ Set of 4 (the actual items in the photo will be shipped) Due to the natural material, there are individual differences in size, color, and hole shape. ※ Individual sales negotiable #CactusWood #CactusBone #NaturalMaterial #BirdSupplies #Perch #Interior #Aquarium #Terrarium