HC31 – Malico Inc. Home » Passive Heat Sink » HC Series » HC31 – Malico Inc. :: HC 31 :: Dimension Model No. L x W (mm) Height (mm) Weight (grams) CAD HC 31-06 31 x 31 6.3 24.9 By request HC 31-10 31 x 31 9.5 32.0 By request Material : Copper 1100 Finish : Anti-Oxidation Remarks : Model number HC 31-06 indicate 31x31mm is package footprint and 6 mm is overall height , all the dimensions are in arithmetic , the drawing overall height is real dimension :: Rth ( oC/W ) :: Air Velocity / Rth ( oC/W ) 200(LFM) 400(LFM) 600(LFM) HC 31-06 4.31 3.08 2.48 HC 31-10 3.68 2.54 1.99