The Core G21 Tempered Glass Edition Mid-Tower Chassis features durable 4mm thick tempered glass windows, a built-in power supply cover for clean cable management, and its excellent expandability and ventilation for high-end gaming configurations. The Core G21 TG supports the latest PC hardware, including the most advanced graphic cards, and air/liquid cooling solutions. Build your ultimate dream rig with Thermaltake Core G21 TG Edition! Tt LCS Certified Tt LCS Certified is a Thermaltake exclusive certification applied to only products that pass the design and hardcore enthusiasts standards that a true LCS chassis should be held to. The Tt LCS certification was created so that we at Thermaltake can designate to all power users which chassis have been tested to be best compatible with extreme liquid cooling configurations to ensure you get the best performance from the best features and fitment.