Specifications Color: BlackSize: 28.5x10.2cmFeaturesSoil block manufacturers can create seed starter soil blocks to produce healthier seedlings and reduce the need for disposable seed starter trays and pods.Soil blocks can be pruned by natural air to promote a strong root system while preventing young plantsfrom becoming root systems. This can reduce the impact of the transplant, and at the same time can more effectively absorb water and nutrients when the plants are transferred outside, thereby helping you make the seedlings healthier.Create a 3 inch block for larger seeds and plants, Make four 1 inches. Block or a 3 inch block for large and small seedsEnvironmentally friendly solutions reduce the need for disposable seed starter trays and podsNatural air pruning helps prevent young plants from forming roots and reduces shock after transplantation. Environmentally friendly solutions reduce the need for disposable seed starter trays and pods. Notes 1. Please allow slight measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 3.Please leaving a message before you give the bad feedback, if Products have some problems.Thanks for your understandings.