These straw cleaners are perfect to clean each size straws and pipes you have (including plastic straws, glass straws, stainless steel straws, smoothie straws, silicone straws), also they would not scratch the insides. Our bendable straw cleaning brush kit not only for cleaning straws, but also convenient for cleaning funnel necks, teapot necks, tube or cylinder and other hard to access corners. Reusable and flexible cleaning brush tools. colour:White Material:Steel wire + nylon size: The length is: 30cm 25cm 20cm The diameter is about 12mm 9mm 6mm Package Contents: 12*Test tube cleaning brush Only the above package content, other are not included. Note: Light 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.