HPB (High Performance Base) is composed of chip limestone, providing a sturdy and reliable base material that is perfect for a wide range of construction applications. This washed product is ¼” in size, making it easy to work with and ideal for a variety of applications. Unique features of High Performance Base is that it can be installed as a base for most landscaping applications without the need for compaction. This makes it a popular choice among professionals and DIY enthusiasts alike, as it saves time and effort during the installation process. HPB is also a clear product, allowing for optimal drainage and making it ideal as backfill for retaining walls. This ensures that your retaining walls will be sturdy and stable, providing long-lasting results that you can count on. 1 Cubic Yard Weight = 2700lbs (approx.) *Images are a representation of the product and may differ from the real product Shipping Note: Your bag will arrive on or before your selected delivery date.