Perfect Size for Seed Starting - The tray insert provides 1.5 inch square inches of growing room per cell.Seed Tray - 12-cell insert tray provides a simple, straightforward way to sow seeds and raise plants from cuttings. The drain hole at bottom of seed tray prevents overwatering.Base Tray - Perfect for use when propagating to catch the excess water that drains from seed trays. Also great for hydroponic use. You can fill the bottom with water and it is distributed to the right places, so the roots can absorb the water.Vented Humidity Dome - You can adjust the ventilation holes to control humidity and temperature. Transparent lid allow you can see seedlings growth process clearly.Keep Seeds Grow Healthy - Seeds need a suitable space to improve their absorption of water and nutrients. These propagator set maintain different climate conditions for groups of seedling and Perfect to transit room temperatures for optimal root growth.size:About 19x14x11cmMaterial:plasticcolour:BlackPackage Contents:20 * seed starter traysOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.