Those bearings aren’t cheap. Honestly, I have been wanting to buy one for a long time just cause I like shit like that but can’t justify it. Maybe one will land in my lap
One 3" Inch Chrome Steel Bearing Ball G100 https://www.amazon.com/dp/B0074VCMFE/ref=cm_sw_r_cp_api_i_m.jcCbDPSZ9A6
One 3" Inch Chrome Steel Bearing Ball G100 https://www.amazon.com/dp/B0074VCMFE/ref=cm_sw_r_cp_api_i_m.jcCbDPSZ9A6
They are not cheap