MK7 MK8 Heat Sink 40MM x 40MM x 11MM For 3D Printer Accessories Feature: Center hole goods size : 12 mm Screw mounting holes 3 mm Mounting holes from 31 mm Fin length 40 mm width 40 mm 11 mm thick Package Included: 1 x MK7 MK8 Heat Sink 40MM x 40MM x 11MM For 3D Printer Accessories