USA Made 6 Cell Trays in Color! Our 6 cell tray inserts are now available in clear and colors! Proudly made in the USA these conveniently sized 6 cell plug inserts are great for growing varieties of crops. Twelve of these removable inserts fit in a Bootstrap Farmer 1020 tray. Made out of food-safe, heavy-duty polypropylene plastic and built to last many seasons. Color code your seedlings in these insert plug trays. Note: Clear 6-cell plugs have a small square tab located on the inside of the cells. It is part of the manufacturing process.  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