... mixing of small quantities of concrete , which are generally used in lab , Specification:Cap: 30LMax, grain size: 40mmMixing speed: 34-35minutesIt ... 2mm Main feature: Capacity about 60L , Enough to use in labSturdy steel mixing axis, rational design for high quality specimen ... t o perform all kinds Three models are available in rang 30L, 100L, 60L Portable Concrete Mixer Laboratory Concrete ...