Diameter approx 4-4,5 mm. Material: cork. Excellent knot strength, resistance and ductility.
We always try to make sure that the images that we show you are as faithful as possible to the real objects that will arrive at home, but are still possible that images may look different (color) due to many monitor or device resolutions.
This product is not a toy, it is not suitable for children under the age of 14.