The Bykski CPU Mount Screws - M4 x 30mm - 4 Pack are replacement mount screws for some Bykski CPU blocks. Specifications Length:30mm Thread:M4 Compatibility (including but not limited to) A-RYZEN-TECH-X-V2 CPU-XPR-AM-V2 CPU-RYZEN-X-BK Parts Included 4x CPU Mount Screws - M4X30mm Warnings Not responsible for any damage caused by or when using this product. Please use at your own risk.