USA Made 6 Cell Trays Our 6 cell tray inserts are made for the grower that wants an easily removable insert when growing a variety of crops.  Made out of food-safe heavy duty polypropylene plastic.  These are not your typical throw-away seed tray inserts.  They are built to be used for many years of use. Also available in colors! Features Made from FDA Prime Grade Extra Strength Polypropylene (#5 BPA free) plastic Extra Large ⅝" Drainage Hole which makes for an incredibly easy seedling removal.  These 6 Cell Inserts are designed with Air Prune technology.  Air channels are added on each side to prevent root circling.  Air pruned roots are shown to provide healthier and more vigorous growth.  Proudly made in the USA our Seed trays are guaranteed to last at least 2 years 12 inserts fit per 1020 tray 60 pack gives you a total of 360 cells 120 pack gives you a total of 720 cells 360 pack gives you a total of 2,160 cells Dimensions Seed tray insert outer dimensions: 5" x 3⅓" x 2¼" height Each cell in tray insert is 1½" x 1½" x 2⅛" on top which tapers down to 1" at the bottom Air pruning slits measure 0.11" wide x 1¼" tall