et tube

As a student, having read a bit on the three devices, It still seems a bit confusing as to what the usefulness and indications of each really are, in the practical sense of things. (besides knowing that the combi is less complicated to deal with in general). But between the King and the ET, it...

Hey guys, So I was wondering how you guys choose the pressure on your suction units. The ones we use are quite old and only have an on and off setting (that I know of). Recently, though, I have seen many companies using suction units with variable vacuum pressure. I have heard that it is...