You can connect your water cooling system with soft tubes. But if you attach particular importance to appearance and want to achieve something special, there is no way around hard tubes. Tubes made of acrylic glass (PMMA) are best suited for this purpose. They offer perfect crystal shine and pure transparency without any color nuance. This way the chosen fluid can be shown to its best advantage! This set consists of two tubes, each 50cm long. Technical details: Material: PMMA (Plexi) Tube color: Transparent Outer diameter: 14mm Inner diameter: 10mm Scope of delivery: 2 x 14/10mm Acrylic Rigid Hardtube 500mm - clear Model: 50231