12 x 12 x 2 inches travel capacity * PVC Frame, Steel guide rods and precision linear bearings provide maxium accuracy and rigidity * M8 x 8 mm ZTW F8 Stainless Steel Leadscrew with ball bearing end support * Effective backlash elemination with brass Anti-Backlash Leadscrew nuts * New Nema 23 Stepper Motors includes, 3.64V, 1.3A 4 wires