The HardTube project becomes reality. Alphacool is here entirely new way of tubing your system! The method so far most commonly used for water cooling systems are the normal PVC hoses - now Alphacool offers another approach to tube your water cooling system. The HardTube variant brings a clean structured look to your system. Brand new are the carbon tubes. Recommended for use with Alphacool HT connectors the carbon tube is 100% carbon made in Germany! The carbon tube cannot be as bent like acrylic tube but must be cut to length and used with the matching elbows. For use with Alphacool fittings only.