F1 grade 1mg-1kg stainless steel scale calibraiton weights kit sets, balance weights. Total 25 pcs weights, use 304 stainless steel. Packed in aluminium alloy case, with factory’s certificate.
Whats the difference between our F1 and M1 Weights:
1. F1 are more precise than M1, with smaller permission error
1. F1 are more precise than M1, with smaller permission error 2. F1 use 304 stainless steel, M1 use 2cr13 stainless steel
3. M1 are with adjust bar (at the bottom of the weights), F1 are without.