ITEM NAME:5X(2Pcs Od14Mm Hard Tube Fittings G1/4 Water Cooler Hard-Tube Connector Fi E5L3) 5X(2Pcs Od14Mm Hard Tube Fittings G1/4 Water Cooler Hard-Tube Connector Fi E5L3) 5X(Internal nested thick O-ring and outer seal double insurance design More unique length stretch compensation With acrylic tube will get the best connection sealing effect The new V4 version of the 14mm hard tube quick-wound connector, internal upgrade 4 seal ring structure, providing a higher level of safety protection. Applicable acrylic water pipe specifications: outer diameter 14 MM Thread size : International standard G1/4 (domestic commonly known as 2 teeth), thread length 4.5MM Process: Electrophoretic black paint Tooth gauge: G1/4 (International General Teeth) colour:black Material: brass size:22*22mm Package Contents: 2 * Water Cooler Hard-tube Connector).(2 Water Cooler Hard-tube Connector). The new V4 version of the 14mm hard tube quick-wound connector, internal upgrade 4 seal ring structure, providing a higher level of safety protection. Tooth gauge: G1/4 (International General Teeth).