Specifications: This product can be used to clean laboratory equipment such as volumetric flasks and reagent bottles. Made of artificial wool, with a very fine brush head, it can bring you a good cleaning effect. It features not easy to shed hair, soft, densely arranged, various specifications, and durable. Item Name: Volumetric Flask Brush Material: Artificial Wool Cleanable Volumetric Flask Specifications: 50ml, 100ml, 250ml, 500ml, 1000ml Features: Cleaning Tool, Durable, Soft, Densely Arranged Size Chart: 50ml: Brush Head Diameter: 55mm/2.17", Brush Length: 290mm/11.42", Product Size: 29cm x 5.5cm x 5.5cm/11.42" x 2.17" x 2.17" (Approx.) 100ml: Brush Head Diameter: 55mm/2.17", Brush Length: 270mm/10.63", Product Size: 27cm x 5.5cm x 5.5cm/10.63" x 2.17" x 2.17" (Approx.) 250ml: Brush Head Diameter: 60mm/2.36", Brush Length: 270mm/10.63", Product Size: 27cm x 6cm x 6cm/10.63" x 2.36" x 2.36" (Approx.) 500ml: Brush Head Diameter: 65mm/2.56", Brush Length: 330mm/12.99", Product Size: 33cm x 6.5cm x 6.5cm/12.99" x 2.56" x 2.56" (Approx.) 1000ml: Brush Head Diameter: 75mm/2.95", Brush Length: 370mm/14.57", Product Size: 37cm x 7.5cm x 7.5cm/14.57" x 2.95" x 2.95" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Volumetric Flask Brush