The Wilmad® NMR Tubes 5 mm Diam., High Throughput manufactured by SP Industies are made of borosilicate glass that complies with the ASTM Type 1 Class B standard and recognized as N51A. This glass may contain Fe2O3 which is paramagnetic around 1200 ppm and has certain impact on shimming quality at high field over 600 MHz.
Specification
Material: Borosilicate glass Packaging: Pack of 100 ea Parameter: 600 MHz frequency L: 103.5 mm Tube diam.: 5 mm Wall thickness: 0.43 mm
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Wilmad® NMR Tubes 3 mm Diam., Type 1 Class A, High Throughput, L 7 in., SP Industries (CAT#: STEM-L-1191-LC)