- Improve mechanical properties, precise size, smooth inner and outer surface;
- About tolerance,normal GB aluminum profiles's tolerance is ±0.2mm，but precision tube can be ±0.1mm;
- Precision tubes can be made from 1000 series, 3000 series and 6000 series, and normally are processed one time;
- Precision tubes target on:Solid round tubes, hexagonal rods and square tubes;
- Every precision tube has two molds, one is for extrusion,the other is for finely extraction.