These buckets are made of HDPE (high-density polyethylene) and feature a sturdy steel handle with a molded plastic grip for comfort. The black finish helps keep the interior of the bucket completely dark. These buckets are great for creating custom hydroponic systems and are perfect for storing and transporting liquids and nutrients. They feature a tapered design for easy stacking, storage, and low cost shipping. These buckets can also withstand temperatures up to 180 degrees fahrenheit.