The Book involves design and manufacturing of Aluminium AL-1060 fins. Two different kinds of fins designs have been considered, first type with a base square up to half the height while remaining portion cylindrical and the second type of fin which is vice versa i.e. cylindrical base up till half the height and remaining portion in square shape. Heat transfer analysis has been done on enhancement and the corresponding pressure drop over a flat surface equipped with Compound Square cylindrical cross-sectional perforated pin fins in a rectangular channel as well as over a flat surface equipped with rectangular cross sectional perforated fins. The channel had a cross-sectional area of 250 x 250 mm2. The experiments covered the following parameters, Reynolds number 13,500- 42,000, the inter-fin spacing ratio (Sy/D) 1.208, 1.944 and 3.417. Correlation equations were developed for the heat transfer, friction factor and enhancement efficiency.