... cataloged as: Ordinary model, Gland model, Branch Manifold Ordinary model, Branch Manifold Gland model. Main Technical Parameters:XO-12B Model Branch Manifold Freezing ... Materials Tray:Ordinary model: special design stainless steel sample shelf, tray spacing adjustable, number of layers free setting; Material drying tray ... nitrogen gas charging valve. XO-12N Branch Manifold Model Freeze Dryer