Root Laboratory 0.5L horizontal sand mill is specially designed for dispersing and grinding of sub-micron, micron, sub-nano and nano grade material. The high efficient cooling system and fine-gap centrifugal separatingsystem could avoid the block of material in separator and ensure a smooth product discharging. It is specially usedin the lab formulation research and small batch production. The lab mill grinding result could be scaled up to theindustrial production.