The Swagelok 304L-HDF4-50 Double Ended Sample Cylinder is a high-quality, new-in-box product designed for air sample applications. It features 1/4" NPT ends on both ends, with an end B diameter of 1/4" and a maximum pressure rating of 1800psig. This cylinder is suitable for a wide range of air control valve and hydraulic applications, making it a versatile addition to any industrial toolkit.