We use the Code Blue Easy Lavage ours comes in 2 sizes 34f and 18f- we usually use this for big overdoses that need lavage and charcoal, we use the charcoal with sorbitol in a tube that attaches right into the system. It takes some practice and it does come with that cool instruction sheet ( with pictures) if you get lost ,I have been an ER nurse for a long time and still find that pictures are a good thing. We do usually save the 34 french for really sick overdoses (bad stuff that really kills people) and those really special patients.