Reference Title: Primary Aluminum Water Cooling Block 30x30mm 40x40mm 40x240mm 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 or 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 or 40x 40x 12MM or 40x 80x 12MM or 40x 120x 12MM or 40x 160x 12MM or 40x 180x 12MM or 40x 200x 12MM or 40x 240x 12MM-Weight:22g or 42g or 78g or 116g or 149g or 170g or 190g or 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)