... 2.5mm Length:50-100mm FR40*100 thread rolling machine, steel pipe making machine,pipe forming machineFR-40*100Technical parameters: Model ... device is optional.7, rolling shape: rolling thread, textured, ruled, rolling light, cross knurling, roll bars, rolling groove, and roll-offQuality ... (2) Factory guarantees all the goods are brand-new; no defects for the specifications or materials used. Twelve ...