Seed Germination Trays (Qty.150) 900 Total Cells Includes 150 Trays for Seed Starting or Cloning 150 Trays with 6 Cells per Tray total 900 cells Each cell measures approx. 1.94 x 2.23 x 2.23 inches deep Fits Inside Standard 10x20 Web Trays or Flats 6 Trays Will Fill a Standard 1020 Flat