Wilmad-LabGlass NMR Precision Tubes are manufactured from borosilicate glass that meets the requirement of Type 1 Class A glass from ASTM E438. Precision tubes have 3 fold less paramagnetic contamination comparing to Economy tubes, and can be operated safely at temperature up to 230 ˚C, and within a temperature step of 120 ˚C. Precision tubes are rated as hydrolytic class 1, which states that the inner surface is resistant to strong acid and base at ambient temperature.
Product Specifications: • Length: 7 inches • Thickness: 0.77 mm • O.D.: 4.9635 ± 0.0065 mm • I.D.: 3.430 ± 0.013 mm • Concentricity: 152 µm • Camber: 51 µm