This tube kit is designed to use with Hayward Stratum vacuum release system models VR1000, VR1000NT. Includes three pieces of tube to replace the tubing internally in the box. This kit contains three pieces of tube to replace the tubing internally in the box. The board end of the metric black tube is held on by a "Barb" connection. Generally this end of the tube must be carefully slit to remove the tube. Replacement order is covered in solenoid valve replacement. Weighs 0.4-pound.