Safe-Guard® Horse Wormer contains 10% fenbendazole and flavored with artificial apple-cinnamon. Controls large and small strongyles, pinworms, ascarids and arthritis caused by fourth stage larvae of S. Vulgaris. For use in horses. Apple-cinnamon flavor makes it highly palatable to horses. Approved for concurrent use with an approved form of trichlorfon (boticide). One syringe will deworm a 550 lb. horse. Size is 25 Gram.