White Strong & Flexible: White nylon plastic with a matte finish and slight grainy feel.
About this Product
For the full description please see part 1
For the whole kit you will need to order the other 2 parts including this one
Part 1: http://www.shapeways.com/model/679959/
Part 3: http://www.shapeways.com/model/679961/brake-disc-part-3.html