These pigtail and hogtail assemblies come with 2 brass connectors brazed onto a heavy wall annealed copper tube with a 250 psig pressure rating. The 1/4 and 3/8 tube have a pull test rating of 500 and 750 lbs. respectively. Different applications require specific pigtail and hogtail assemblies. Special attention is required when ordering to ensure the proper assembly is purchased for the intended application.