... -10°C ~ +40°C/RH<65%.2.Round Shape Basic Specifications of diameter have 0.9mm,1.3mm,2.3mm,3 ... welted in bottom)3.1 can be sewn the wire on the cloth and leather gloves, car seat cover, hats, handbags ... , or fix on smooth surface of things3.2 Diameter is 2.3mm, Edge specifications: the length (L): 3.5mm ...