This type of fitting may be called by several names depending on the manufacture. The common feature is that the tubing can be removed from the fitting by pushing on a releasing collar for disconnections and connections and are widely used because of this. With this type of fitting, the tubing is held in place by flexible toothed collet, that bites into the outside of the tubing. The collet teeth are moved away from the outside diameter of the tubing when the releasing collar is depressed. This allows the tubing to then be removed. An inside seal is used to seal the tubing when installed. These type of fittings are typically used with higher durometer tubing such as our polyurethane tubing. These One-Touch fittings are used for low pressure applications and are available from Mountain High in our standard 4mm and 6mm sizes. 8mm is also available on special request.