Extruded plug seed tray is different from the normal sheet formed plastic tray. The most different is the weight and thickness. Extruded plug trays is to make sure each place of the cell is the same thickness (usually is 1mm). Extruded plug trays is much heavier and higher prices than sheet formed trays. So it will have a strong buttom of the cells, make it can hold more heavy soil without changed the shap. While the normal sheet formed trays are thinner in the buttom of holes
Different size and different thickness of the extruded trays has different price list, Please contact us to get the updated prices list, thank you. In this page you will find special sell like: 128 cells big size trays , big trays 162cells(9*18), and 200cells(10*20)