SH250: an extruded modified PTFE (PolyTetraFluoroEthylene) Fluoropolymer tubing, with a continuous operating temperature of +250°C (550°F). SH250 will shrink when heated to 621°F. Shrinkage ratio — 1.5:1. Used wherever hi-temperature protection required. Applications: Protective covers in corrosive environments, protection for electronic components, cable jacketing covers on immersion heaters, heat exchangers, light duty bearing surfaces, roll covers. MIL-I-23053/12 Class 2** or Class 3, MIL-DTL-23053/12, AMS-DTL-23053/12. STD.P-U: 100', Sizes 30-14: 3ft. min., 13-1" 1ft. min. lengths.