If you are looking for a professional and water cooling adapter set, then your research is over here. That's because our product can meet your need. Adopted of , it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features -Color: Silver -Material: copper -Size: 3.00X2.00X2.00cm/1.18X0.79X0.79in Compatible hose: outer diameter 4MM for inner diameter 3-3.5MM hose, outer diameter 5MM for inner diameter 4-4.5MM hose, outer diameter 6MM for inner diameter 4.5-5MM hose, outer diameter 7.2MM for inner diameter 5.5-6.2MM hose, outer diameter 8MM for inner diameter 7-7.5MM hose, outer diameter 9MM for inner diameter 7-8MM hose - The whole is compact, the inner diameter is chamfered, and the resistance is smaller. - Can be used to connect with 3-3.5mm, 4-5mm, 5.5-6.2mm and 7-8mm inner diameter hose. - The method of use is simple and will not take you too much time. - This item is suitable for PC water cooling application, water pump tank connector. - It is simple in design, but very practical in use, which brings great convenience to you. Package list: 12 cooling fittings