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1.7 mm 1H sensitivity reference tube
1.7 mm 19F sensitivity reference tube
1.7 mm gradient recovery reference tube
1.7 mm 13C sensitivity & resolution reference tube (ASTM)
1.7 mm 31P sensitivity reference tube
1.7 mm 15N & 13C pulse calibration tube
1.7 mm water suppression reference tube for RT probes (10 mM sucrose)
1.7 mm water suppression reference tube for Cryoprobes (2 mM sucrose)
1.7 mm 1H lineshape reference tube
1.7 mm 13C sensitivity & 1H decoupling reference tube