Features: 1.Function: Low cost, labor saving, convenient transportation, convenient management, improve production. It can also be used for seedling production in field cultivation and factory production in vegetable soil cultivation. 2.Usage: Do not water for 3-7 days before transplanting, so that the rockwool blocks are dry and the seedlings are frozen. When the roots fully grow out, the rockwool is transplanted into the soil together with the rock wool. Water 2-3 days after transplanting. 3.Materials: Rockwool plugs are made of quality rockwool, which is spun into marshmallow like fibers by exquisite workmanship, with low packing density, lightweight texture and durability. 4.Wide Range of Uses: Rockwool plug is suitable for planting, transplantation, rooting, cloning plants, bacteria, etc., is an excellent choice for hydroponics and soilless plants. 5.After-sales Service: If you have any problem, please contact us immediately, we will help you solve it as soon as possible. Specifications: Material: Rock wool Color: Green Size: 2.7 x 2cm Notice: 1.Actual color may be slightly different from the image due to light effect. 2.Please allow 1-3cm deviation due to manual measurement. 50 * Soilless Culture Seedling Rockwool Plugs or 100 * Soilless Culture Seedling Rockwool Plugs