Sold by the decimeter (10 cm lengths)
Outside diameter of 4.10 mm and 0.51 mm wall thickness (heavy-walled tubing)
Sold with a hard temper
Good for creating findings and custom tube settings for faceted stones. Set a 3.5mm stone in this size tube, as you want an outside diameter about 0.5mm larger than your stone and enough thickness inside to cut a seat for the stone.