DescriptionA major advancement over the previous classic design with the thicker hose connector. The thicker wall eliminates hose kinking . The internal valve feature keeps the electrode sealed until it is applied to the patient . This simplifies and speeds up the application of these electrodes. All of our Vacuum hose lead sets are built to last , all hoses are made of PVC and have a stainless steel stranded wire conductor .Hose Connector for Vacuum Suction Cup ElectrodesTwo colors to choose from: White or Red