The Tomco 5591A Fuel Injector Seal Kit is a lightweight accessory designed to ensure a secure seal for fuel injectors, weighing 0.25 lb. This kit is manufactured by Tomco, known for producing quality fuel injection parts, making it a reliable choice for maintaining air and fuel delivery systems in cars and trucks. With the manufacturer part number 5591A, this seal kit provides a precise fit for optimal performance in fuel injection systems.