Alvin® Twist-Lock Telescoping Tubes 3" I.D
These telescoping tubes adjust in length from 24" to 40" with an inside diameter of 3". Twist-lock adjustment for desired lengths at 3/4" increments. Made of durable black plastic that is water-resistant. Features a translucent cap at one end for aid in labeling contents. Includes an adjustable shoulder strap. For blueprints, drawings, maps, posters, and more.