ALVIN® Telescoping Tube – 3" I.D Twist-Lock

These telescoping tubes adjust in length from 24" to 40" with a 3" inside diameter. Twist-lock adjusts for desired lengths at ¾" increments. Made of durable black plastic, tube is water-resistant and ideal for drawings, maps, posters, and more. Features twist-off screw cap with a window for viewing contents inside tube, identification label to mark its contents, and adjustable shoulder strap.