... .density:19.35g/cm3 3.shape:according to customs' requirement Tungsten Filament1. grade : WAL 1, WAL 2,WAL 3 ,W1 ,W22 ... to the customer's needSpec. Application : 1. for producing electric light source parts and electric vaccum components. 2 . for producing heater ... and provide professional service to our customers around the world tungsten wire