Excellent For Large Seed, Multi Sowing, Seed That Need A Deeper Root & For Potting On Seedlings To Achieve Garden Ready Plants.black 9 Cell Tray Designed To Fit In Our Propagator.6 Trays Will Fit On Our Water Tray.trays Have Letters & Numbers Down The Side To Help Identify The Cell.uv Resistant & Re-usable Year After Year.tray Size L 18cm X W 15cm X H 8cm. cell Size 5cm X 4.5cm