... operation; adhere to top-grade products manufacturing and professional service. 1.Material:Alu + steel+varius material2.Dia.:2. ... :from 5 to 50 4. coloredAluminium blind rivetsAluminium rivet body and Steel mandrelOpen type, dome headFinish: color coated MaterialAluminium+ steelDiameter (mm ... , 12, 14, 16, 18, 20, 25, 30, 35, 40 polished and nigrescent rivet