F1 use 304 stainless steel, M1 use 2cr13 stainless steel. Adjust bar (at the bottom of the weights), F1 are without. The item "F1 Grade 1kg-5kg Precision Stainless Steel Scale Calibration Weight Kit Set m" is in sale since Monday, June 3, 2019. This item is in the category "Business, Office & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Other Test Meters & Detectors". The seller is "mywelllife" and is located in CN,CN.
This item can be shipped to all countries in Europe, all countries in continental Asia, United States, Canada, Australia.