Spare screw kit for the Alphacool NexXxos XP CPU water block, also compatible with other CPU water blocks. This mounting kit features an elegant black surface and slim design. Technical specifications: Knurled nut inner thread: M4 Dimensiosn knurled nut (HxD): 8x12mm Spring length: 15mm, black colour Screws: 4x M4x45mm Weight: 38g Extent of delivery: 1x Mounting screw kit, consisting of: Allen key, plastic washers, M4 knurled nut high shape, springs, screws