MaterialOur seed starter is made of high-quality silicone, which will not melt, become brittle or crack even under the most extreme conditions, and can be recycled for years. Breathable Ventilation HolesThere are ventilation holes at the bottom of the silicone seedling tray, which allows sufficient oxygen to reach the plant roots while preventing moisture accumulation. Multi PurposeSilicone seedling trays are perfect for seeds, vegetables, plants, flowers and seedlings, perfect assistance for farm, and garden workers. SizeThe size of the silicone seedling starter is about 18*14*6.5cm/7.1*5.5*2.6in, suitable for nurseries and miniature greens, you can stack them together to save space. Protect RootsThe flexible silicone wall is ideal for transplanting plant seedlings in your garden by protecting the integrity of the seed roots and soil.