16 yellow 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 Pads minimise the transmission of minute vibrations while maintaining full compatibility with standard fan screws and most other mounting systems Yellow colour for creating stunning yellow/black themed builds with Noctuas chromax line fans Trusted Noctua quality backed up by 6-year manufacturers warranty