Makes 20 blocks that are 1 3/8" x 1 3/8" x 1 5/8" high. Includes standard dibbles that make small depressions in the tops of soil blocks for seeds. Experienced growers can make and plant up to 2,500 blocks per hour. This is the tool to have if you plan to use soil blocks for transplants on a commercial scale. Developed in conjunction with Eliot Coleman.