This document introduces the features of Agilent 28 Channel Thin Shims. It is a shim coil that is approximately 50% thinner than traditional designs and provides 28 gradient shims. This shim coil optimizes the available internal bore space of Oxford Instruments 500, 600, and 750 MHz magnets, allowing the use of Agilent's most advanced 45 mm outer diameter NMR probes, such as the OneNMR Probe. It offers excellent control of field homogeneity.