The Original. The ZEPHYR® brush is, without question, the finest brush in fingerprint ever developed for use in fingerprint work. No coarse fibers. The 6.5" long brush consists of thousands of fiber bundles, each being composed of over a hundred individual treated-glass filaments. The diameter of the glass filaments is a fraction of the diameter of regular hair fibers used in other fingerprint brushes, resulting in a brush with unsurpassed working qualities. The outstanding characteristics of the ZEPHYR brush are its long life, capacity to pick up and retain large amounts of fingerprint powder, and the fact the filament's ends become softer with use.