NEW!!! High Accuracy High Resonance frequency contact AFM probes HA_HR series with stable and wear-resistant long lifetime W2C conductive coating, each chip has 2 cantilevers, resonant frequency 37 kHz / 19 kHz, force constant 0.65 N/m / 0.26 N/m. W2C+ conductive coating is modified to provide better stability in high humidity conditions.