Reference Title: Primary Aluminum Water Cooling Block 30*30mm 40*40mm 40*240mm for Liquid Water Cooler Heat Sink System Silver Use For PC Laptop CPUDescription: Features:brand new and high quality. Feature:-Internal flow channel extrusion forming-Brazing parts into a whole-Leak rate of less than 5X10-6 mbar.l/s parts-Internal fin thickness 0.5MM-Processing: vacuum aluminum brazing-Surface treatment: silver oxidation-Applicable to computer CPU water, industrial inverter driver, laser for head cooling, industrial control cabinet cooling-Size:30x30x12MM / 40x 40x 12MM / 40x 80x 12MM / 40x 120x 12MM / 40x 160x 12MM / 40x 180x 12MM / 40x 200x 12MM / 40x 240x 12MM-Weight:22g/42g/78g/116g/149g/170g/190g/231g Package included:1 x CPU Water cooling Note:1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1 X Primary Aluminum Water Cooling Block (No retail package)