Audi Air Conditioning Systems With R-134a Service Training Self Study Program 220. Softcover, measures 8 1/4 x 12 inches and 20 pages. ASE Certified. Part # WSP-521-220-00. book is in good condition with minor wear. I am in the process of listing a large collection of auto and motorcycle repair manuals, a lot of VW and Audi. I have over 270 unique items listed here on Ebay so please check them out!  Thank you for your consideration!