... , Sea FreightCeramic Ferrule for Stud Welding Ceramic Ferrules are specially designed for various studs welding. The Products are made from ... cordierite which is ideal material and applied in shipbuilding industry, welding operation ,heavy construction fields, etc. Main benefits 1. Good ... of the ceramic products .Such as M 6 ,M 8 ,M 10 ,M 13 ,M 16 ,M 19 ,M 22 regular and penetrable etc .our ...