Backplate Bracket Holder PC CPU Cooling Fan For Intel LGA 775 1700 AMD AM2/3/4 Specifications: Name: desktop CPU water cooling head I-frame fastener Material: carbon steel, surface painted Thickness: 2mm, all screw holes on the fastener diameter is 4.1mm. Applicable platform: Desktop For Intel LGA775 LGA1155 LGA1156 LGA1366 LGA1700 square type LGA2011, etc.; For AMD AM2 AM3 AM4 full series Installation method: First fix the screws on the motherboard, then install the water cooling head, adjust the position, then install the fastener, then install the spring, gasket, fastening screws. Screw specifications: such as M4 * 70 indicates a diameter of 4mm, length 70mm;such as M3 * 60 indicates a diameter of 3mm, length 60mm. Package includes: 1PCS*Bracket 4PCS*M3*60 Screws 4PCS*M4*70 Screws Notes: Please check the product model and picture description before purchase to ensure that the product is applicable, thank you! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.