Couple ?s
I bought a set of those cheap rockers on Ebay about 3 years ago, I think they are the same.
I noticed that they were not even bushed, let alone roller bearinged on the inside. I put them back on ebay immediately and spent the $$ on Harland Sharp.
The bare alluminum against the shaft, is going to gall, and end up dumping metal in your motor. The load on the rocker is right up against the oiling hole.