Shigemi Inc. proudly introduces the latest high precision NMR tubes. The uniform inner diameter is achieved by vacuum forming, and the smooth outer surface is obtained by means of a fully automated grinding and polishing machine system. The quality of our NMR tube is unequivocally proved, even when used at the highest frequency regions, 800 MHz. We believe that our ceaseless technological advances have made it possible to produce NMR tubes with the highest precision, unrivaled in the world. In order to ensure the high quality of our products and meet various customers' requirements, each tube is tested individually and ranked according to its thickness and linearity. We hope our sample tubes are most useful and beneficial to all of our customers.