Master Barber Genuine 100% Hard Rubber Combs are made for the Professional Barber. Burr-free, saw-cut teeth are rounded by hand to ensure a smooth, even finish. Will not snag or scratch the scalp. Resistant to chemicals and high heat exposure (up to 178ºF).Master Barber Jr. features half medium teeth and half extra fine teeth. Teeth measure 1/2" on tall end tapering to 3/16" on small end.