EK-Quantum Velocity 2 Mounting Screw 1200/1700/AM4 - Nickel (4pcs) is a set of four (4) spare nickel-plated 21.6mm long screws for mounting Velocity 2 1200, 1700, and AM4 water block product series. These screws, situated on the water block itself, play a vital role in fastening the water block to the motherboard and attaching it to the backplate. Technical Specifications: - Thread: M3 - Screw length: 21.6mm - Head type: Flat Model: 3831109907504