The lot consists of five 3/4" × 3" black malleable iron pipe nipple fittings. These fittings are designed to join together sections of pipe or tubing in a plumbing system. The use of malleable iron makes them durable and resistant to corrosion, making them suitable for various industrial and plumbing applications. Each fitting measures 3 inches in length and has a 3/4 inch diameter, providing a secure and reliable connection between pipes.