we recommend the following 50ml automatic spring back continuous syringe, which is designed for large animal, such as cattle, horse,etc. also the capacity of this automatic spring back continuous syringe available in 10ml, 20ml and 30ml, which are suitable for the small animal, such as sheep, pigs, dogs, cats,etc.  this 50ml automatic spring back continuous syringe is with simple structure, easy to clean and replace the spare parts for longer service life,  the automatic spring back design of handle make it convenient and labor-saving to use.