The "Guardian" Rubber Seal with Flap is a durable and practical solution for protecting air lines from debris. Constructed of durable black Buna N Compound, this seal features a rubber flap and metal seal screen to ensure optimal protection. Sold individually, this versatile seal fits most makes and models, making it a convenient and reliable choice for air line maintenance. With its high-quality construction and effective debris protection, the "Guardian" Rubber Seal with Flap is a valuable addition to any air line system.