HC21 – Malico Inc. Home » Passive Heat Sink » HC Series » HC21 – Malico Inc. :: HC 21 :: Dimension Model No. L x W (mm) Height (mm) Weight (grams) CAD HC 21-06 21 x 21 6.3 11.9 By request HC 21-10 21 x 21 9.5 15.6 By request Material : Copper 1100 Finish : Anti-Oxidation Remarks : Model number HC 21-06 indicate 21x21mm 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 21-06 6.00 4.35 3.72 HC 21-10 5.31 3.84 3.24