The Automator Trays increase yields by as much as 40%. The special SRM RED™ material dramatically enhances the growth and yield of tomatoes, peppers, eggplants, melons and even cucumbers. The patented tray warms the soil for early root development and directs water and fertilizer to the plant roots. Helps retain soil moisture to help prevent blossom end rot. Keeps cut worms and weeds at bay. These 12" x 12" square trays are made to fit inside of the Burpee Tomato Cage for an even better growing experience. Easy to use, clean and store.