Thermaltake Pacific RGB Plus TT Premium Edition G1/4 PETG Tube 16mm OD 12mm ID Fitting took RGB fittings to a new level with software-controllable 16.8 million colors LED that is visible from all directions. The RGB PLUS fitting is designed for 16mm OD /12mm ID hard tube and produced with high quality copper that ensures durability. Color up your system with Pacific RGB Plus TT Premium Edition Fittings.