Product size cm: single: total length 90cm, nylon hair length 4cm, diameter big head 3cm, small head 1cm Cotton yarn total length 3cm, diameter 2,5cm Product weight (net weight) g: single: 34.9g Use selling point: inner bore length 90cm, brush 3cm for trumpet French horn, trombone instrument cleaning brush cleaning with ease, inner bore made of high-quality stainless steel wire material not only increases softness, but also effectively protects the instrument plating; dense nylon brush, wear- Color: As Shown Material: Stainless Steel + Nylon Brushed Wire + Cotton Yarn Package Contents: 2 * Wind Instrument Cleaning Accessories 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.