A Prima Tech Draw Off is used with a tube fed syringe. The spike is inserted in the top of the medicine bottle while the cap of the Draw-Off prevents leakage. This Prima Tech Draw-Off will fit most syringes as well as the F-Grip Auto Syringes.
For use with 50ml to 100ml bottles/ 20mm
https://www.youtube.com/watch?v=lp0lZnJc9hs