1,It is about 100 grams per package, meeting your needs definitely. 2,It is specially made to work with tumbler and polisher. 3,Pins are prepared and made from stainless steel that will be attracted to the movement of the magnets and yet not rust like steel shot media. 4,Tiny pins reach into the tightest areas. 5,The pins having a larger diameter provide a heavier weight and more impact on the surface during the finishing operation. Features: It is about 100 grams per package, meeting your needs definitely. It is specially made to work with tumbler and polisher. Pins are prepared and made from stainless steel that will be attracted to the movement of the magnets and yet not rust like steel shot media. Tiny pins reach into the tightest areas. The pins having a larger diameter provide a heavier weight and more impact on the surface during the finishing operation. Specification: Material: Stainless Steel Color: Shown As Pictures Optional Diameter: 0.2mm, 0.3mm, 0.4mm, 0.5mm Item Weight: 100g Type: Jewelry Making Tool Sets Package List: 1 x Pack of Polishing Pin Note: It is reusable, use with care. And, When it is not used, please clean it and keep it dry. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.