The OC series is an oval flat brush with reinforced boar bristles and a cork handle, available in 3 models. A modern twist to a classic shape, the Oval Cork Series features Mahogany wood, an ergonomic, naturally antimicrobial cork handle and reinforced boar bristles that stimulate the scalp and create shiny, smooth hair. The OC6 and OC4 are great for applying product to the hair for total saturation before a blow out or an air dry, while the OC7 is designed for long hair and extensions and can can also be used to achieve volume. A rubber pneumatic pad allows the bristles to easily penetrate the hair without pulling or breaking the hair. Each brush has a tiny air hole on the bottom of the pneumatic pad to prevent the brush from tugging or pulling the hair. Do not think a bristle is missing, this is by design. Made in Spain.