SubZero manufacture the highest grade stainless steel bho, ethanol, hydrocarbon extraction equipment and hemp oil extractors such as falling, wiped film evaporators and isolate crystallization ( crystalline ) systems. Here at SubZero we manufacture the highest grade stainless steel extraction equipment in the industry. Our ASME-certified welders create beautiful ethanol extraction equipment with exceptional stainless steel quality in the USA. Our service is unmatched, we provide training and ongoing support for our products last throughout the entire lifecycle. We also believe in transparent pricing, so what you see is what you pay.