16 white 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 White colour for creating stunning black and white themed builds with Noctuas chromax line fans Trusted Noctua quality backed up by 6-year manufacturers warranty