White Cobble poly bags are made up of 40mm - 90mm white dolomite/marble cobbles with rounded edges. Ideal for rockeries and boarders. Features: Size: 40mm - 90mm Colour: White Shape: Rounded Rock Type: Dolomite & Marble Fish Friendly: No Supplied Washed: No Lime Free: Yes Recycled: No Available in 20kg Poly bags or 850kg Bulk bag. Matching white pebbles available.