I designed this simple lock mechanism so I can quickly disconnect the air hose from my Creality air assist pump to use with more than one device, and it makes it easier to route the tubing if you have different equipment that requires different lengths of tubing - this way I can leave a length of tubing attached to the laser at all times. Slide one end of the hose through the anchor and into the union and then repeat on the other side, keeping some tension on the hose so that it cannot back out. Friction keeps it in place. The anchor is printed in TPU and the union in basically any rigid filament, though you could also use TPU for that if you want. It will work on any air pump with a hose of the same diameter, and you can remix the dimensions however you like. I've been using it for months will zero issues.