Alfie Pet by Petoga Couture - Darra Grinding Minerial Stone 2-Piece Set for Birds This is a set of 2. Measures 3" long. The mineral stone is 1.5"L x 0.75"W. Flower shape, can be hung in the cage as molar,a play toy or just for decoration. Special uneven surface design for better clean bird's mouth. Made with pet safe materials. Connects to cage easily with quick-link attachment.