19mm Slide Bearing Ball with Hole Steel Ball Can be Used as improved Hardware device 6.1mm Through Hole Metal Primary Color Ball
https://www.vogueparade.com/shopping/EN/42/1/1005003628503594/19mm-slide-bearing-ball-with-hole-steel-ball-can-be-used-as-improved-hardware-device-61mm-through-hole-metal-primary-color-ball//