Check the listing for details. VIVOSUN 12-Pack Seed Starter Trays 144-Cell Germination Reusable Humidity Domes. Condition: New. Listed at 16.99 USD. About this item Upgraded Design & Adjustable: It is equipped with a transparent dome and an adjustable vent that helps manage moisture and temperature; It also comes with drain holes to prevent overwatering and protect roots Compatible with Heat Mats: Made of durable, high-quality material, our seed starting tray is compatible with a heating mat that operates at a temperature range of 0~120℉ Reusable & Multipurpose: The long-lasting trays are reusable and can grow all sorts of seeds; You can use the cell tray directly or simply put 6 30mm seedling blocks on the base tray Easy to Use: It is a useful approach for centrally managing your plants and the operation; It’s very easy to remove your plants from these starting trays and transplant them into pots or your garden Large Capacity & Accessories: The seed starter trays can expand to large volume; Includes 12 12-cells seed trays, 12 base trays, 12 humidity domes, 1 pack of garden tools, and 10 garden labels