TC acclimation kit, 3-piece Bio dome with 12 cells, Colors vary between green and clear, current stock is green. Great kit to get for seed starting or tissue culture acclimation. Select the option to add enough perlite and stratum to fill the 12 cells or select the easy-to-use coir plugs. Acclimating tissue culture plants is fun watching every stage of growth. 12 cell humidity dome is great for seed staring, propagation or TC acclimation. Tray is 7"x5"x4.74" clear plastic so you can easily watch your plants develop. Perlite 50%, Stratum 50% mix is a great option to get your tissue culture plants going.