Value Plastics XQCM755-1006-B Natural Acetal Tube Fitting, Barbed Open Flow Coupling, 1/4" (6.4 mm) Tube ID, Buna-N O-Ring, Male (Pack of 10) Coupler with angled barbs for connecting pipes or tubing in a straight run Fitting connects to tubing on one end and a male connector on the other Acetal copolymer plastic for low moisture absorption and high tensile and flexural strength Buna-N O-ring elastomer seal for long cycle life and repeatable, leak-free connection Single-barb design for increased pull-off resistance compared to three-barb styles