Use this washers to give your aircraft a nice clean look. And add color to your aircraft too.
High quality cap bolt washers. Available in two sizes that can fit M3/ #4-40 threads. 
Choose from Red, Blue, Gold, and Black!
Sold in packs of 10                                                                                                  
Material: aluminium 6061-T6 (anodized)
Out Side diameter: 10.0mm
Inside diameter: 3.5mm 
Bolt: M3, #4-40
 
Note: US warehouse black color is sold out. other products are available in US warehouse , you can choose US warehouse shipping.