Soft and pliable, with a natural shape for the tender mouths of lambs, kids, piglets, foals, and other small livestock. Made with a special rubber formula to prolong nipple life and improve pliability. Fits the Little Giant 2-Quart and 3-Quart Snap-On Nursing Bottles (Item Nos. 98CB, 9803CB, 9812, and 9813, each sold separately). 0.5 inch diameter by 3.5 inch long.