White nylon plastic polished to reveal a smooth matte finish.
About this Product
Version 1.1. Mini-fig wings based on Kreon TFP. V1.1 thickens the parts where it is gripped by the clip. Tested in White S&F polished. Fits the clip nicely. A tiny bit loose in some positions/angles (typical usual +/- 1%), but a bit of paint or nail-polish tightens it up nicely.