Type D: 1/4" 316 SS Sheath with 18" Teflon Covered Leads, 100 OHM Element @ 0°C (900°F Max.) Sheath Length: 5 1/2" Compression Fitting: Yes* *Includes 1/4" NPT RC adjustable compression fitting with teflon insert (400F max.) tight to 1500 PSI and fits over 1/4" nominal O.D. tubing