This is a metal portal axle for mn99s sold on AliExpress. link - ko.aliexpress.com/item/1005003536638730.html?spm=a2g0o.productlist.main.1.2858qyVIqyVI1e&algo_pvid=6043c7d1-acda-4e12-95f4-87724ce2f35d&algo_exp_id=6043c7d1-acda-4e12-95f4-87724ce2f35d-0&pdp_npi=4%40dis%21USD%2127.11%2118.98%21%21%2127.11%2118.98%21%402101584d17127381224067736ebef0%2112000026982525800%21sea%21KR%210%21AB&curPageLogUid=Tuw5mAhgjefp&utparam-url=scene%3Asearch%7Cquery_from%3A