Vespel ® SP-1 polyimide is the ultimate high-performance material for the world's most demading applications. No other material can match Vespel's combination of temperature resistance, chemical resistance, mechanical toughness, natural lubricity,wear-resistance and insulation properties.
Vespel SP-1 provides operating temperatures from cryogenic to 300°C (570°F), great plasma resistance, plus a UL rating for minimal electrical and thermal conductivity.
Vespel® SP-1 is the unfilled base resin grade. SP-1 provides maximum physical strength, elongation, and toughness as well as the best electrical and thermal insulation values. 
 Black River has an Inventory of Vespel Rods, Plates, Tubes & Rings.