Varian 5 mm 300 MHz auto switchable nmr probe. Auto SW PFG 4NUC/30-122 MHZ NUC- 13C 31P 15N  4NUC Counter 63,63,52,63, 8.8 PF Capacitor Stick, ¼ Wave Stick, G51PF Capacitor Stick, Air 13C/ 31P X-Channel VT Control (serial number:P004614) (p/n 0190408305) Please contact us for complete refurbished/used nmr probe details. (Varian NMR probe) (01-904083-05)