The application of UPuper® new product CP R20 plug with the tray?

UPuper® CP R20 plug with tray
• Pre-filled rock wool plugs in the seedling tray
• Design for automatic seedling
• Perfect finishing for highest usable transplants
• Saving the shipping costs
• Perfect homogeneity
• Good firmness, for automatic seedling
• Ideal water and air balance
• Foundation for Precision Growing
• Optimal firmness