Professional paddle brush features extended bristles for easy detangling and reduces stress to hair and scalp during blow-drying and styling. Ideal for smoothing hair during blow-drying to create smooth, straight styles. • lightweight • size: 9.9in x 3.4in The paddle brush is designed with one bristle missing in the bottom, middle half of the brush. This hole is to provide ventilation and to aid in drainage after the brush has been washed. Additionally it helps to prevent any bacterial growth that could occur with pooling water on the inside of the brush.