The calf is strong, but you should not remove the calf using a sharp tool, as this may damage it.
The calf is made of food-safe silicone.
This material is heat resistant and lasts longer than rubber calfs.
It does not become stiff over time like a rubber calf.
The light color helps notice if the calf is clean or needs cleaning.
Fits E61 grouphead machines
Calf measurements:
73mm x 57mm x 8mm