Great item to complete that set missing one weight.

While these were used for years with great accuracy, modern weights don't use solid brass since they tarnish over the years and this may change weights for micro-measurements with modern equipment. With normal home and kitchen scales, they still work great. Unless you need to measure 0.005 of a gram.

If you have any questions please just ask.

Shipping is USPS with tracking.

Thank you for looking.