Wear on the edges. Shipped the next business day! We own a small family book store and sell our extra media that have been on our shelfs for too long. Additional Details ------------------------------ Product description: The essential primer on injection molding design and executionInjection molding has become ubiquitous, and the proof is in the product from parts to packaging to products, this versatile manufacturing method has become a hallmark of the plastics industry. Injection Theory and Practice is an essential primer for designers and line workers alike, providing clear, expert guidance for every step of the process. From molds and materials to hydraulics and electrical mechanisms, this book tells you everything you need to know to effectively design for and work with an injection molding machine.