Little Friends Calcium Blocks. Calcium is essential for a bird#s normal formation and functioningCalcium blocks are also enriched with additional vitamins and trace nutrientsThey help to counter iron deficiencies in a bird#s diet, as well as keeping a birds# beak in good shapeThe blocks can easily be hung onto the bars of a cage for easy access Suitable for most birds, and especially young ones Size(L x W x H): 40 x 40 x 20mm