[ MAIN PARAMETER ] small heatsink with a M3 size hole; Size 1: 20 x 15 x 10 mm / 0.79 x 0.6 x 0.4 inch (L*W*H); Size 2: 17 x 15 x 10 mm / 0.67 x 0.6 x 0.4 inch (L*W*H); Size 3: 16 x 15 x 7 mm / 0.63 x 0.6 x 0.3 inch (L*W*H). [ MATERIAL ] Aluminum Alloy…