Dynatron K1 1u Cooler for Xeon Intel Lga1155 1156 I5 I7 CPU Application: Socket 1156 Support Intel Core i3 530/ 540, Core i5 650/ 660/ 661/ 670/ 750; Xeon Processor 3400 Series; Core i7 870 / 860. Heat Sink Material: Aluminum with Skiving Fins. Dimensions: 95.0 x 95.0 x 26.5 mm. Weight: 300.0g. RoHS Compliant.