The PrimaTech Compressor Ports & Line Connection O-Rings is the perfect solution for medium to heavy duty truck owners. This comprehensive kit includes compressor ports and line connection O-Rings in sizes ranging from #6 to #18. The pieces are color coded to make it easy to organize and identify the components. This kit is perfect for anyone who needs to replace or repair their compressor ports and line connection O-Rings. With this kit, you can be sure that you have all the necessary pieces to get the job done right. FleetPride is your First Click in Heavy Duty®.