ITEM NAME:White Cleaning Brush Glass Laboratory Lab Tubes Instruments Tubing R8L1 White Cleaning Brush Glass Laboratory Lab Tubes Instruments Tubing R8L1 Product Name : Test Tube Brush;Material : Nylon, Stainless Steel Brush Size : 10.5 x 4.9cm/ 4.1" x 2"(L*Max.D) Total Length : 38m/ 15" Weight : 21g Not just for test tubes, the nylon bristles are great for cleaning all sorts of surfaces. It is also very flexible, you can bend it around for hard to reach places. Package Content : 1 x Test Tube Brush Note: Light shooting 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..Brush Size : 10.5 x 4.9cm/ 4.1" x 2"(L Max.D). Not just for test tubes, the nylon bristles are great for cleaning all sorts of surfaces.