I brought this because I like to use Thumpers and Bongs to cool down and filter particle's in the vapor and to also be able to adjust the air flow. Honestly, I can really only speak about the Airflow Valve, which works perfect at totally cutting off the air flow. Both items are high quality machined accessories.
On a personal note, I would like to thank the Simrell Collection company, and in particular Austyn, who is very nice and was kind enough to educate me on Analog Dry Herb Vaping devices, he is definitely an innovator in this industry.