Soft silicone tubes are much more delicate for porridge on the beak,throat and head.When using the silicon tube in adult parrots the tube must always be inserted well inside the beak and not near the tip of the beak , to prevent the parrot biting the tip of the tube.The syringe allows you to crop feed your bird without running the risk of puncturing the crop, especially for those new to feeding birds as crop needles require a high level expertise,Special soft silicone feeding tube that is 0.5 mm,1.0 mm,2.0 mm ,2.5 mm,3.0 mm,3.5mm,4.0mm,4.5mm,5.0mm,5.5 mm thick in diameter, which locks into your syringe and holds the silicone locked with a barb. Too many syringes out there have no lock and over time will come off the syringe and either suffocate your bird or the poor bird may even swallow the tube.The syringe is 12 mL for smaller birds or younger birds. Ideal for hand rearing conures, parrotlets, budgies, cockatiels, etc. The syringe comes apart for easy washing and has no black rubber plug that gets brittle over time and a breeding ground for germs.We do offer a larger syringe for larger parrots such as ringnecks, eclectus, galahs, cockatoos, etc.The syringe is 50 mL for larger animals or older birds. Ideal for hand rearing ringnecks, eclectus, galahs, cockatoos,lizard,snake,tortoise etc. The syringe comes apart for easy washing and has no black rubber plug that gets brittle over time and a breeding ground for germs.The culture tube fits the tip of the syringe for hand feeding.Commonly used with birds to administer nutrition or medications in a liquid form.Also used for flushing or irrigation of wounds or other treatment areas. Can be autoclaved/sterilized for repeat use.Available in different gauges and lengths to meet every need.