The Alphacool HardTube allows you to route and design your water-cooling build exactly the way you want it. With incredibly clean lines, the HardTube eliminates the need of excessive compression fittings or angle rotaries. This new 90 degree tube features Borosilicate glass which not only looks amazing, but offers stability and durability - as most chemicals and temperature fluctuations can not harm the glass. Alphacool HT connectors make installation very simple, and provide a complete seal. 20cm on short edge and 40cm on long edge.