1.Product : Double Thread Screw 2. Support 3.Size: M6x40,50,30,80,90,100 M7x40,50,60,80,90,100 1.Product : Double Thread Screw 2. Support 3.Size: M6x40,50,30,80,90,100 M7x40,50,60,80,90,100 4. Material: brass 5. Advantage : made of high quality carbon steel excellent wear resistance competitive price 6. Use : Buiding Material Plumbing Material