Hydrofarm Rockwool Block Covers 4" Pack of 40 shoe-cover With the capability to maintain

With the capability to maintain precise temperature control

which only has continuous water flow during the first two minutes

Apply when you first see signs of flower development

7 3/4" 18 10 9

African violets

Hydrofarm Rockwool Block Covers 4" Pack of 40 shoe-cover With the capability to maintainDescription Product Details: Block light from media Reflect light to plant leaves where it's needed most Eliminate algae and mildew growth 40 dual sided block covers per pack Specifications Barcodes: 10638104945780 (GTIN) 638104945783 (UPC A) Dimensions: 5. 4L x 5. 2W x 5. 6H (CS) 5. 5L x 4. 5W x 0. 3H (EA) Shipping Weight: 0. 16 lbs.