TW-coupling(tank truck coupling DIN28450): Stainlesssteel:VK5011/2,VK50,VK80,VK100, MK50,MK80,MK100,VB50,VB80,VB100,MB50, MB80,MB100,VKST50,VKST80,MKST50,MKST80 Brass:VK50,VK80,VK100,MK50,MK80,MK100, VB50,VB80,VB100,MB50,MB80,MB100 Aluminium: VB50,VB80,VB100,MB50,MB80,MB100