O Ring fitted on base of a large number of Hiabs, for instance, Hiab 070, Hiab 071, Hiab 080, Hiab 090 Etc.
Fits between the base and king post also known as the column.
If you are not sure about terminlogy of crane parts, have a look at the technical page as it shows a breakdown of a crane.
If you are still not sure just contact us.
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