Metal, Round Metal, AND Round Vinyl Flex. It's the only slide rule on the market that has conversion for. Testing for Correct System Airflow for A/C & Heating for both electric and gas. Troubleshooting TXV's (TEV's).
Capacitors - Laws & Practices. And every Formula & Conversion needed. For more information and to access over 100 Video Training Tutorials. Or watch our YouTube video What is the SuperCool? The item "20 Lot New & Improved SuperCool Slide Rule Duct Calculator Flex Metal Ductulator" is in sale since Monday, June 8, 2015.This item is in the category "Business & Industrial\HVAC & Refrigeration\Other HVAC & Refrigeration". The seller is "designstein" and is located in San Angelo, Texas. This item can be shipped worldwide.