soilless cultivation planting cotton i-shaped mouth hydroponic sponge seedling sponge vegetable digging round hole polyurethane sponge 无土栽培定植棉工字口水培海绵块育苗海绵块蔬菜挖圆孔聚氨酯海绵

no. 25 cotton no. 32 cotton no. 40 cotton no. 45 cotton no. 50 cotton no. 60 cotton no. 70 cotton i-shaped mouth seedling sponge no. 25 pit cotton (100 pieces each) no. 30 pit cotton (64 pieces each) no. 35 pit cotton (49 pieces each)

white black