@ Dolly, It'll be part no:7.
When I changed my shocks to Boge Turbos, I thought I'd clean and hamerite that part on mine before I put them back on. After wire brushing them I noticed that I could see loads of holes through the top of them, they were like a culenders (spelling?).
Anyways I got new off GSF, and I still put a few layers of Hamerite on.