MW21 – Malico Inc. Home » Passive Heat Sink » MW Series » MW21 – Malico Inc. :: MW21 :: Dimension Model No. L x W (mm) Height (mm) Weight (grams) CAD MW 21-12 21 x 21 11.6 4.7 By request MW 21-15 21 x 21 14.6 5.2 By request MW 21-18 21 x 21 17.6 5.8 By request MW 21-21 21 x 21 20.6 6.4 By request MW 21-23 21 x 21 22.6 6.8 By request MW 21-28 21 x 21 27.6 7.8 By request MW 21-33 21 x 21 32.6 8.7 By request Material : Aluminum 6063 Finish : Black anodize Remarks : Model number MW21-12 indicate 21x21mm is package footprint and 12 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) MW 21-12 5.59 3.73 3.08 MW 21-15 5.10 3.46 2.82 MW 21-18 4.76 3.24 2.59 MW 21-21 4.43 3.00 2.40 MW 21-23 4.15 2.81 2.25 MW 21-28 3.74 2.52 2.04 MW 21-33 3.43 2.29 1.90