16 cm Cleaning Area with Bent Top to Wash Hard to Reach Areas of Bottles Extremely Comfortable Handle Cleans and Scrubs Better than Plastic Brushes No Chemical Processing on the Brushes. All Natural and Antibacterial Coir Bristles and Premium Stainless Steel Wire We use Natural Solid Wood in All Our Brushes. Natural Wood has Variations in Shade Ranging from Off White-Yellow-to Grey Brown. The Grains on the Wood are also Indicative of the type of Wood we use. It is therefore Only Natural that you will not Receive the Same Shade each time.