Grodan Rockwool 2"x2"x2" Sheet of 50 sites & 10"x20" Cut Tray w/ 2" Dome Combo Great kit for starting seeds or cuttings Standard 10"x20" tray can be reused again and again Heavy Duty 2" Humidity Dome can be reused 2"X2" Grodan Cubes are great for starting seeds Another great item from Flora Hydroponics!