Made of high-strength aeronautical aluminum. - Anodized in color
60% lighter than stainless steel. TYPE: CAP NUTS FOR THREAD SIZE: M4 X 0.7 FOR SCREWS-Ø: 4.0 MM SELF-LOCKING: NO WRENCH WIDTH: 7MM Material: Aluminum SURFACE: ANODISED SILVER RESISTANCE CLASS: NO RESISTANCE CLASS SPECIALTY: CLOSED SURFACE: BLUE ANODISED SURFACE: BLACK ANODIZED SURFACE: GOLD ANODISED SURFACE: ORANGE ANODISED SURFACE: VIOLET ANODISED SURFACE: RED ANODIZED