Plates are saw cut to oversized dimensions. Widths under 6 inches are (+.249/-0), over 6 inches (+0.999/-0), Length is (+.999/-0) PET-P (Polyethylene Terephthalate Polyester) is a thermoplastic polyester, commonly referred to as just Polyester. With good dimensional stability, electrical properties, high strength, low water absorption. Commonly known under tradnames such as Ertalyte, Tecapet, Sustadur, and Untep.