Black Ice comes in a mixed bulk bag of 14mm - 22mm angular black & grey ballast/marble gravel chippings that are ideal for driveways, rockeries and boarders. Features: Size: 14mm -22mm Colour: Black & Grey Shape: Angular Rock Type: Ballast/Marble Fish Friendly: No Supplied Washed: Yes Lime Free: Yes Recycled: No Available in 20kg Poly bags or 850kg Bulk bag.