These are replacement airflow tubes for the HVT Sai TAF (Top Airflow) atomizer, we consider them to be the biggest and most essential part upgrade for the HVT Sai TAF as these make more difference to vapour production than anything else.
Instead of having a simple tube which directs air straight to the centre of the bucket, pushing material to the edges; this upgraded airflow part splits the air into three streams which face the corners of the bucket, where the concentrate naturally moves to. This helps keep air directed at the concentrate and also helps to create other random airflow patterns inside the bucket through entropy, all of which aid in vapourization by keeping the concentrate moving around in the bucket.
These new airflow tubes are also shorter than the original. The benefit here is much the same as it is on the Poseidon V2 Bubbler with increased vapour production due to a reduced cooling and spreading effect.
We've made a video on YouTube which shows how this part is used.