1/8" MNPT push to connect tube fittings offer easy installation of air lines. Simply push 1/4" OD tubing into fitting, no gluing or special tools required. Reusable by simply pushing sleeve in and releasing tubing. Milton® nylon push to connect tube fittings are designed for use with nylon, polyurethane or low and high density polyethylene tubing. Great for the garage or shop, push to connect fittings allow for maximum air flow and faster connection than standard compression fittings.