200g:You will revieve 200g stainless steel color polishing pins in 2 sizes, 1 bag/100g of each size,which meet your needs definitely. 2 Sizes:About 0.01 inch(0.3mm) in diameter, 0.20 inch(5mm) or 0.08inch7mm)long.It is specially made to work with tumbler and polisher. Material: the pin is made of stainless steel, which will be attracted by the movement of the magnet, but will not rust like the steel shot medium. Application: The tiny pins extends into the narrowest area. Pins with larger diameters provide heavier weight and greater impact on the surface during finishing operations. Used in Industry:Can be used for deburring, chamfer,rust removal,rough polishing,precsion polishing,jewelry polishing, auto parts, valves, bearings, instruments, motors, switches, plastic hardware, etc.