The new Eiszapfen PRO HardTube fittings from Alphacool are a further development of the well-known, previous Eiszapfen. When developing the fittings, Alphacool focused specifically on one particular problem: the deformation of PETG hard tubes at high temperature. These can deform at 60 C. Although such a temperature is rarely reached, it can still occur. The Eiszapfen PRO prevent this problem from the outset and keep the tubes in position.Deformation is prevented by the new nylon inserts on the inside and stabilizes the hard tubes. Furthermore, the fitting still has an O-ring and a compression seal. However, the contact area is much larger than with normal O-rings, which ensures a better hold. Through the use and the compression seal in the screw connection, the tube is reinforced from the inside and outside.The Hard Tube does not slip even under higher loads. Alphacool has tested the tensile strength of up to over 8kg! So there is no need to worry about this.Technical details:- Material: brass- Colour: deep black- Diameter: 22 mm- Height: 20mm- Thread: G1 / 4 \"- Thread length: 5 mm- HardTube size: 13 mm- Compatibility: PETG, acrylic, brass and glass tubes- Weight: 0.023 kg- Scope of delivery: 1x Alphacool icicle PRO 13mm HardTube Fitting G1 / 4 - Deep Black