This Vintage Pocket Spec Book is over 10 years old and contains technical data that doesn’t exist anymore, with countless of discontinued grades listed. Of course there is still an enormous amount of current tech data as well. There is no wasted space for unrequired information, this book is clear, concise, and comprehensive in its listing of material types. It is definitely a "must have" book in the toolbox of any conscientious process technician or molder to ensure the best possible product from the molding process.