Material: Rubber NBR, black, 70º +/-5º Shore A.

These oil-resistant rubber pads can be cliped into the axial bores of
the MÄDLER® shaft collars type B1. The rubber pads enable a careful and
vibration-damping clamping of a machine component on a shaft. For
mounting, the pins should be lubricated with oil or grease. At collars
from stainless steel, tire mounting paste or alternatively hand
dishwashing detergent can also be used.