The AlphaCool icicle screw-on fitting, made of brass and with a diameter of 20 millimeters, has two different sides. One side features a 1/4-inch thread and is compatible with most components. On the other side, a 13/10 millimeter hose can be connected. The thread has a length of five millimeters. The AlphaCool icicle screw-on fitting is straight in shape, and its nut has beveled edges that ensure the O-ring is pressed tightly against the hard tube. This is a pack of six screw-on fittings.