100pc Black/White Rooting Sponge Hydroponics Block Cloning Collar Aquaponics Net Pot Sponge Anti-Alga 4 Size Available

Features:

1.Black color,against alga growing
2.Fix rootstock to right direction
3.Re-usable for next seasons
4.New material,clean and good quality
5.Conserve water for plant grow

Specifications:

1. Color: black/white
2. Material:polyurethane
3. Size: φ25*20mm, φ32*30mm,φ40*30mm,φ45*30mm

Application:

1.Soiless agriculture growing
2.Seedling nersury