The study compares the mechanical performance of two types of nylon monofilaments used in testing for the presence of protective sensation in diabetics with peripheral neuropathy. Comparisons of the application force between a group of calibrated and a group of non-cali-brated 5.07 nylon monofilaments were conducted to determine the properties of each type of filament. The analysis demonstrated that there was no significant difference in the application force generated between calibrated and non-calibrated nylon monofilaments.