Grodan Rockwool is known for its quality, consistency and performance. Each sheet of Grodan Rockwool 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 rockwool or plant them directly in soil. For any growing application, rockwool offers speed, ease of use and cleanliness. This is a single sheet of 50, two-inch square plugs.