The Clamp is the cheapest item from this partsfiche.
A sample from the products for the 13 Frame include: Cover, Nut,self-locking (81j), Duct 1, Duct 2.
With all the components that make up the HW125 2012 53B1 EUROPE XENTER 1L53B-300E1 13 FRAME assembly. The Bush 2 is the most frequently specified with two applications.