Featuring excellent design of lightweight and breathable feature, you can use the hydroponic cups to offer appropriate water to your plants, and the matched rock wool cubes can give you a great aid with their strong water absorption and good drainage performance. After high temperature treatment, these hydroponic cups are safe for you plant without any harmful chemical and worm eggs, so they are ideal choice for planting without soil which are suitable for various plants cultivation and transplanting with their good porosity. Made of plastic and cotton, it is durable and safe. The width of this cup is 5cm, and the height is 5cm. The length of each rock wool cube is 2.5cm, the width is 2.5cm and the height is 4cm. It is suitable for garden, home yard, greenhouse, farm and so on. Item Name: Hydroponic Cups Material:Plastic,Cotton Size Details: Hydroponic Cups: Width: 5cm/1.97", Height: 5cm/1.97" (Approx.) Rock Wool Cubes: Length: 2.5cm/0.98",Width: 2.5cm/0.98", Height: 4cm/1.57" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 26 X Hydroponic Cups(Plants Not Included) 30 X Rock Wool Cubes 1 X Cotton Rope(10M Long)