∅4.7mm aluminum spheres (100 pcs/set)
https://www.scientificgear.shop/shop/k12-05245-01-4-7mm-aluminum-spheres-100-pcs-set-30377
https://www.scientificgear.shop/web/image/product.template/30377/image_1920?unique=ac13f7e
Aluminum Spheres, ∅4.7mm (100pcs/set)
