F1 use 304 stainless steel, M1 use 2cr13 stainless steel. M1 are with adjust bar (at the bottom of the weights), F1 are without.
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We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday.New and good quality Package included: (1mg 2mg 2mg 5mg 10mg 20mg 20mg 50mg 100mg 200mg 200mg 500mg 1g 2g 2g 5g 10g 20g 20g 50g 100g 200g 200g 500g 1kg 2kg 2kg) What's the difference between our F1 and M1 Weights: 1. F1 are more precise than M1, with smaller permission error 2. F1 use 304 stainless steel, M1 use 2cr13 stainless steel 3. The item "M1 Grade 1mg 2kg Scale Calibration Weight Set + Adjust Bar USA STOCK" is in sale since Monday, May 13, 2019. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Calibration Weights". The seller is "aplus-bargain" and is located in Rowland Heights, California. This item can be shipped to United States.