The VL-41 is a replacement bow hair bundle crafted from 100% genuine, unbleached Mongolian horse tail hair, measuring 29.5 inches (75 cm) in length. Mongolian horsehair is considered the gold standard in bow hair for string instruments — sourced from horses that roam freely in natural environments, it offers exceptional grip, resilience, and tonal quality. Unlike bleached hair, this unbleached hair retains its full structural strength, ensuring it does not break or fray under the demands of intense playing. Each strand is hand-selected and carefully sorted for consistency, guaranteeing that only the finest hair makes it to the final product. Suitable for violin, viola, and cello bows — an essential re-hairing material for players and luthiers.