Shop for authentic DuPont™ Vespel® Polyimide SP-1 plaque. SP-1 is unfilled and offers superior wear and insulation properties with operating temperatures from cryogenic to 260°C (500°F). Low electrical conductivity. Highest elongation and purity of SP family. Stocked materials typically ship in 2-3 business days. Can’t find what you need? Get a quote.