16 black anti-vibration pads for up to 2 compatible round frame 140mm fans Compatible with NF-A15 series fans (see Noctua. at website for detailed compatibility info), ideal for spicing up the NH-D15 chromax. black. swap Pads minimise the transmission of minute vibrations while maintaining full compatibility with standard fan screws and most other mounting systems Black colour for creating stunning all-black themed builds with Noctuas chromax line fans Trusted Noctua quality backed up by 6-year manufacturers warranty