The CubeTubes are equipped with two standard G1/4" threads. The channel is equivalent to a hard tube with a 12mm inner diameter. We ensured that the fluid cannot back up in the channel to prevent any disruption to the cooling circuit. A nearly transparent milled surface provides a premium look. High-quality EPDM seals ensure a leak-proof seal even under heavy use. Technical details CNC-milled and hand-assembled in Germany Product dimensions (W x H x D): 140 x 31 x 16 mm Color: Transparent Material: Acrylic glass, plastic Connections: 2x G1/4" ports Scope of delivery 1x CubeTube 140mm 2x M3x5mm mounting screws