3.5 mm stero double pin dc earphone plug 1.ROHS Certificate 2.Materials: copper rod (59%), ... POM plastic (POM-450 Japan) POM plastic ,Tray 4. ... 0mm,totsl lengh 19.5mm, 3.5 mm stero dc plug for earphone : 1.Materials: copper rod ... C, 3-5 seconds 4.. Save under room temperature in dry area 5.Every style monthly output 5,000,000 pcs ...