The reflex coating is an approximately 30 nm thick aluminum coating on the detector side of the cantilever which enhances the reflectivity of the laser beam by a factor of about 2.5. Furthermore it prevents light from interfering within the cantilever. The virtually stress-free coating is bending the cantilever less than 3.5% of the cantilever length.

Cantilevers of the 15 series are generally used in tapping mode for imaging hard samples, when high topographic and phase contrast are necessary. The 15 series is also good for non-contact AFM. 

These tips are designed for non-contact or tapping mode imaging. They feature a tetrahedral tip that protrudes from the very end of the cantilever allowing it to be the only probe to offer real tip visibility from the top even if the probe is tilted.