Item Type: Hard Tube Fittings_x000D_ Support PETG/PMMA rigid tube with an outer diameter of approx. 16mm / 0.6in_x000D_ Thread: Male G1/4_x000D_ Material: Good-quality brass body + aluminum alloy outer ring_x000D_ Sealing Method: Built-in silicone sleeve1Chamfering and grinding are no longer required when the hard tube is inserted. When using the metal hard tube, it is still necessary to ensure that there is no burr protruding from the tube body 2There are friction of the silicone inner sleeve, the hard tube is difficult to fall off after being tightened to prevent from falling off 3In the test range, the pulling force of about 20kg will not cause the hard tube to fall off (but it should be noted that if the outer diameter of the hard tube is less than 16MM, the anti?dropping effect will be affected) 4Hard tube fittings support PETG/PMMA rigid tube with an outer diameter of 16MM 5Built?in silicone sleeve, which make the product tightly sealed, not easy to fall off, very stable 1 x Hard Tube Fittings 1 xSealRing