This all-in-one unit ensures steady supply of water for seedlings. Just keep the reservoir filled and the soil will remain perfectly moist. The APS 12 ensures sturdy, healthy transplants that will thrive in your garden when using our Germinating Mix Insulated growing tray and greenhouse cover trap warmth and moisture to speed germination Capillary matting and reservoir let seedlings help themselves to water as they need it, even if you're away Seedlings pop right out of the tray for planting, which prevents root damage and transplant shock Slim profile makes APS-12 perfect for windowsill growing Replacement Parts are available View all of our APS Sizes Two APSs with twelve, 2-inch cells, each cell is 2 inches deep. Overall: 15-1/4" L x 5" D x 7-1/4" H with clear cover. APS Pegboard, APS 24 Planting Tray, APS Water Reservoir, APS Capillary Mat and APS Greenhouse Cover Gardener's Supply Exclusive