K&S Telescopic Tubing has a thousand and one applications, from crafting and hobbies to medical and industrial. Made in the USA, this high-quality round tubing can be used when doing electrical or woodwork, making prototypes and models, puppets, and so much more. - K&S Telescopic Tubing - Brass, Small Telescoping Tubing Assortment, Pkg of 12, 12"K&s Metal Telescopic Tubing, ROUND BRASS SMALL - This assortment includes; 12" brass tubes measuring 1/16", 3/32", 1/8" 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", and 13/32" in diameter.