Drum Gross Capacity: 400 Litres.Net Mixing Capacity: 300 to 320 Litres per batch (Perfectly optimized to comfortably handle 1 bag of cement plus ballast and sand without spilling over).Engine Type: 178F Air-Cooled, Single-Cylinder, 4-Stroke Diesel Engine.Engine Power Output: 6.0 HP to 7.5 HP.Drum Rotation Speed: 25 to 30 Rotations Per Minute (RPM).Hourly Output Production: 4.5 to 6.0 cubic meters of wet concrete mix per hour.Drum Sheet Thickness: 3mm Upper Drum / 4mm Bottom Drum heavy-duty cast steel.