Washing machine problem?

[Matermx]

Just checked my washing machine after washing some clothes and have discovered this, not sure whether this has always been there or please help

[Manumission]

I don't think that's perished rubber. It looks regularly shaped and machine made.

[Darlink]

It's normal , stop worrying !

[ErrolTheDragon]

Its meant to be there.

[DramaAlpaca]

What they all said ^^