The Super Sprouter? Heated Germination Kit is a great solution for your germination needs. The kit includes an Ultra Clear 2 inch germination dome with vents, 10 x 20 inch double-thick tray, 72 site insert tray, Super Sprouter? heat mat, instructions and growing tips. All that's required is your preferred growing media for germination and you are ready to grow. Heat mat is ETL listed.