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For use as Hand Stitching or Machine Thread
#69 = .333mm Thick
#92 = .357mm Thick (Use #92 for Bobbin Thread in Machine)
#139 = .476mm Thick
#277 = .667mm Thick
Polyamide 66 Threads are made up of macromolecules with repeating units linked together by much stronger amid bonds (Chemical Bonds), rather than other threads that are held together by ester bonds.
They have the properties of well wear resistance, high strength and controlled stretching, and are UV resistant, repel moisture and also colour fade resistant.