Feature: 1. SURFACE OXIDATION TREATMENT: Good quality aluminum material after surface oxidation treatment, wear resistant and durable 2. ACCURATE SIZE WITH EXCELLENT WORKMANSHIP: Aluminum heatsink cooler have accurate size with excellent workmanship, durable for a long service life 3. MAXIMIZE CONTACT SURFACE AREA WITH COOLING AIR: Designed to maximize the contact surface area with cooling air to provide greater heat transfer 4. WIDELY USED: Suitable for CPU power amplifier PCB board, used as high power cooling block radiator, widely used in computers, power transistors, FETs, ICs, power amplifiers, voltage regulators, MOSFETs, SCRs, etc. 5. 120X120X20MM OVERALL SIZE: The overall size of the heat sink is 120x120x20mm, suitable for many kinds of hosts, DIY motherboards, very practical Specification: Item Type: Aluminum Heatsink Cooler Material: Aluminum Surface Treatment: Surface anodic oxidation Overall Size: Approx. 120 x 120 x 20mm / 4.72 x 4.72 x 0.79in Purpose: Suitable for CPU power amplifier PCB board, used as a high power cooling block radiator. Package List: 1 x Aluminum Heatsink Cooler Note: Please match the appropriate size before use.