This K&S Precision Metals 3400 small telescopic assortment pack comes with 12 round brass tubes, one for each of these diameters: 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'. These tubes are forged with high - quality brass, ensuring both durability and a classic look. Ideal for DIY projects, custom crafting, or engineering tasks, they offer strength and adaptability.

Using these round brass tubes is easy. For DIY projects, you can cut them to your desired length with a tube cutter or a saw. When crafting custom designs, connect different sized tubes to create unique structures. In engineering tasks, they can be used for building small - scale models or prototypes. When handling the tubes, wear gloves to avoid scratches on your hands and the tubes. Store them in a dry place to prevent rusting. If they get dirty, clean them with a soft cloth and a mild brass cleaner. With proper use and care, these tubes will last you a long time.