Product Name : Anti Static Brush;Type : M Size Brush Size : 3 x 1.7 x 1cm /1.2inch x 0.67inch x 0.4inch (L * W * );Total Size : 17 x 2.7 x 1cm/6.7inch x 1inch x 0.4inch (L * W * H) Hanger Hole Dia : 5mm/0.12inch ;Material : Plastic, Conductive Fibers Color : Black;Weight : 71g/SET Black plastic handles are to charges to ground. Removes dirt on PCB or other sensitive components, and discharges the static electricity to the ground. Allow for a complete and safe cleaning of ESD sensitive components without generating any harmful static charges. Package Content: 20Pcs Anti Static Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.