Thomas Medical EZ-Inject Sonohysterography Catheter, High-Flow (TMI1162). For Sonohysterography and Hysterosalpingography. Sterile, disposable, simple and ready to use, just insert and inject. No balloon for a more complete view of the entire cervical os. Rigid catheter sheath allows for simple placement and single operator use. Provides a longer tip for improved seating in the cervical canal and has a wider tip for increased flow. Specially designed top helps prevent leakage. Cost effective. 10/BX. Priced per box. FREE Shipping!