Belart Drying Tubes with Tube Fittings • Drying tubes with tube fittings can be filled with desiccant of your choice. • Each tube is supplied with two polypropylene fittings with serrated tapered end • Fittings are designed to accept 6.4 to 9.5mm (¼ to ⅜") I.D. tubing • Unbreakable polyethylene straight tubes; 16mm I.D. x 19mm O.D. (⅝ x ¾") • Note: Drying agent not included