Round oil brush with brass socket and nylon PA6 bristles, which can be used up to a working temperature of 100°C. At higher temperatures, V2A stainless steel brushes are used (up to approx. 300°C). The corrugation of the bristles in relation to their length was determined in a series of tests to achieve the optimal ratio between storage capacity (sponge effect) and shape retention, thereby avoiding smearing.
