Usually 3-5 Days. 45 Day Lowest Price - 100% Satisfaction Guarantee. Introducing the Auralex Designer Series Treatments-DST! The DST422 is the same cut as the DST-112, but running lengthwise in a 4' x 2' panel. Allows for great ideas to coordinate with DST-114, DST-244 and a bunch of our traditional Auralex products.