Specifications: *Strands are safe on the head and easy to replace *Material: Nylon Material *Brush Length: 30mm(Approx) *Brush Cleaning Range: 4 -12 (Approx) *External Thread Size: 1/2 inch(Approx) *Thread Cleaning Diameter: 12 -24 (Approx) Package Contents: 1*Chimney Brush Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.