The 36 series is a small, inexpensive, four row "scratch" or "toothbrush" style brush made of rugged and static-neutral plywood. Brush comes with horse hair material. Horse hair is soft, resilient and long lasting. Excellent for sweeping polished surfaces, horse hair works well for dusting, flux removal and general cleanup. It is non-conductive. - Can be used in ESD sensitive environments as long as the brush remains saturated in liquid. It is recommended that the brush be tested on the required application to confirm ESD compatibility.