RL style probes feature low temperature 316 stainless steel sheath 400°F (204°C) or high temperature alloy 600 1200°F (650°C) a rugged stainless steel transition with stainless steel strain relief spring to protect from sharp bends.  The transition is rated to 400°F (204°C) or silica cement potting rated to 1000°F (538°C).  Lead wire is available in FEP 400°F (204°C) or Fiberglass  900°F (480°C) solid or stranded for maximum  flexibility.  Stainless steel overbraid is also available for added protection of lead wire.