Grodan stonewool is known for its quality, consistency and performance. Each sheet of Grodan Stonewool A-OK Starter Plugs is perfectly-sized to fit a standard flat and each plug has a pre-formed hole to easily plant seeds and cuttings. Once rooted, gardeners can transfer individual A-OK Starter Plugs to larger pieces of stonewool or plant them directly in soil. For any growing application, stonewool offers speed, ease of use and cleanliness. This is a single sheet of 50, two-inch square plugs.