Cardinal Health Universal Bubble Tubing. Laboratory grade BUBBLE tubing. Tapered bubbles every 36″ may be cut to form appropriate size female or male connector end. Uniform wall thickness and a smooth, nonporous, nonwetting surface. Conductive type meets N.F.P.A. specifications for use with flammable gas agents. Clear, flexible polyvinyl chloride formulation is nontoxic, highly stable, chemically resistant, and autoclavable. Goes on and stays on most size barbed connections.