100Pcs Hydroponic Sponge Planting Gardening Tool Square Seedling Sponges for Greenhouse Features: 1. Made of material, it is safe e.  2. Sprouting without soil or chemical additives. 3. Sponge block recesses for easily clip seedlings.  4. Easy to clean and corrosion resistant, the roots grow through the mesh fabric for better breathing and growth, gorgeous decoration in your garden. 5. It can be widely used in greenhouse cultivation, vegetable planting base. Specification: Condition: Material: PU sponge Color: As Pictures Shown Size(Side length x Height): approx.25 x 24cm/9.8 x 9.4in Weight: Approx.38g    Package list:  100 x Hydroponic Sponge Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.