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plant propagation tray,germination tray,seeding tray,cell seed tray,greenhouse tray,seed plug tray seed starting tray,plastic seed tray,nursery tray,plug tray,seedling tray EPP EPS seeding tray The thickness and weight of the product can be customized. 21. 32, 50, 72, 98.105, 128.200 seedling trays and tree support trays are available for selection. Customization is also possible. The materials include PS, PET, and PVC. Seedling trays, propagation trays, succulent growing