1pcs Diameter 5mm - 22mm Stainless Steel Screw Balls Piercing Balls Polish Ball Semi-hole with M2 Threaded Round Balls
https://www.vogueparade.com/shopping/EN/42/1/1005003346326247/1pcs-diameter-5mm-22mm-stainless-steel-screw-balls-piercing-balls-polish-ball-semi-hole-with-m2-threaded-round-balls//