An unmarked pipe is an unknown danger - immediately identify pipe contents with these markers. Arrows show directions of flow. Self-sticking marker material in printed in 4 mil flexible vinyl and over laminated with a 2 mil, UV resistant polyester film. Service temperature is -20° to 140°F. Its acrylic adhesive back applies to a smooth, clean pipe surface - click more for other material descriptions. Directional flow arrow included with markers.
