MW55 – Malico Inc. Home » Passive Heat Sink » MW Series » MW55 – Malico Inc. :: MW55 :: Dimension Model No. L x W (mm) Height (mm) Weight (grams) CAD MW 55-12 55 x 55 11.6 22.8 By request MW 55-15 55 x 55 14.6 25.8 By request MW 55-18 55 x 55 17.6 28.8 By request MW 55-21 55 x 55 20.6 31.8 By request MW 55-23 55 x 55 22.6 33.8 By request MW 55-28 55 x 55 27.6 38.8 By request MW 55-33 55 x 55 32.6 43.8 By request Material : Aluminum 6063 Finish : Black anodize Remarks : Model number MW55-12 indicate 55x55mm 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 55-12 2.57 1.65 1.25 MW 55-15 2.28 1.45 1.07 MW 55-18 2.06 1.28 0.91 MW 55-21 1.87 1.10 0.77 MW 55-23 1.67 0.97 0.67 MW 55-28 1.47 0.83 0.53 MW 55-33 1.20 0.64 0.38