Stainless steel, single piece gavage tube.
8 gauge (approx 15cm long) - for Harris hawks, large macaws, large cockatoos
10 gauge (approx 12.5cm long) - for small macaws, small cockatoos
12 gauge (approx 10.5cm long) - for cockatiels, African greys, Amazons, most falcons
14 gauge (approx 9cm long) - for budgerigars and small parakeets, plus small raptors
16 gauge (approx 9cm long) - for finches and canaries
18 gauge (approx 6cm long) - for waxbills and other small birds