ITEM NAME:5Pcs Set BF350-3AA BF350 350 ohm High-Precision Pressure Resistance Strain NZM.5Pcs Pressure Resistance Strain Gauge. In the strain gauge model, N is the creep number, and the creep value is different with different labels. Resistance value (R) : 350Â ±0.1. We'd like to settle any problem in a friendly manner.