1/8" MNPT nylon push to connect elbow fittings offer easy installation of air lines. Simply push tubing into fitting, no gluing or special tools required. This 5/16" OD connector also fits an 8 mm metric tube OD and is reusable by simply pushing sleeve in and releasing the tubing. Push to connect fittings allow for Maximum air flow and faster connection than standard compression fittings. Great for the garage or shop, these swivel elbow fittings pivot 360 degrees Fahrenheit or easy installation and use.