Air Vent Advantages
Bou-Matic, Milk-Rite and the Conewango vent all of which were around 0.400 deep. The IBA vent would be similar in depth to the last three.
The Hybrid vent is almost impossible to clog compared to the others with the exception of the Bou-Matic vent which has the small opening on the outside while Milk-Rite, Conewango and IBA all have the small opening on the inside of the vent (tapered from the larger opening on the outside and getting smaller as it transitions to the flow of milk. Bou-Matic has a patent on their vent.