The complete bottle brush set is completely free of plastic. It is composed of a stainless-steel handle, sisal bristles and a soft cotton tip to avoid scratches. Sisal is won from the agave plant and a completely natural, vegan resource. The wire made of stainless steel is strong, yet flexible. You can easily bend it and put it back to shape to reach all areas of all your glassware. The small brush Diameter: 20 mm Length: 25 cm Minimum bottle diameter: 12 mm The medium brush Diameter: 30 mm Length: 30 cm Minimum bottle diameter: 15 mm The large brush Diameter: 45 mm Length: 35 cm Minimum bottle diameter: 20 mm