TC acclimation kit, seed tray, 3-piece Bio dome with 40 cells, Great kit to get for seed starting or tissue culture acclimation. Select the option to add enough perlite and stratum to fill the 40 cells or select the easy-to-use coir plugs. Acclimating tissue culture plants is fun watching every stage of growth. 40 cell humidity dome is great for seed staring, propagation or TC acclimation. Tray is 15"x9"x4.74" clear plastic so you can easily watch your plants develop. Perlite / Stratum 50/50 mix or the easy-to-use coir plugs are a great option to get your tissue culture plants going.