Drum brake for Caterpillar / Mitsubishi number 91B33-50010, this item listed also as MB91B33-50010 MB 91B33-50010 MB91B3350010 MB 91B3350010 MITSUBISHI91B33-50010 MITSUBISHI 91B33-50010 MITSUBISHI91B3350010 MITSUBISHI 91B3350010 CT91B33-50010,  Discriptions: Outer diameter D1 =280 mm Internal drum diameter D2=254,5 mm Total height brake drum H1= 197 mm Diameter D3= 100 mm Number of mounting holes hub AT-G1=6 Number of holes AT-G2 = 6 Height H2 = 57 mm