GUM Interdental Brush features a 1.2mm brush size designed for effective cleaning between teeth. This bi-direction brush set includes 6 pieces with antibacterial bristles that help remove plaque and debris from interdental spaces. The 1.2mm size is suitable for medium to larger interdental spaces. Each brush in this 6-piece set features a bi-directional design that allows for cleaning in both forward and backward motions. The brushes are color-coded for easy size identification and come with a protective cap for hygienic storage.