Looking to get Maximum airflow through your Thermal Accumulator? This Mesh top for the TA4 allows full airflow through the heated ball chamber, into the herb. This TA4 top has left hand threading just like the standard top for the TA4. The reverse threading makes it easy to de-cap and empty your spent herb using a Magsink without worry of unscrewing the chamber holding the balls, Pictures show Standard TA4 Conversion to the HiFlo. Only the conversion HiFlo top is included in this prlurchase. TA housing is only shown for demonstration. Comes with the HiFlo Reverse threaded cap, and 2 mesh screens.